CVE-2022-37436

HIGHNVD 5.37.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 7.0 because EPSS predicted 56% probability of exploitation within the next 30 days (99th percentile of EPSS-scored CVEs) when EchelonGraph scored this CVE. NVD baseline CVSS 5.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction (continuous uplift above 30%)
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated

Also known asEUVD-2022-40063 (ENISA EUVD) · GHSA-3f78-wq4j-7vgr (GitHub Security Advisories)Source: ENISA EUVD

7.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • 335 internet-facing services (distinct ip:port) on record running an affected version — derived from Shodan data (© Shodan); a patched service can stay counted while its port stays open
  • High exploitation likelihood — EPSS 56%
CISA-KEV: Not listedEPSS PROB: 56%CVSS: 5.3Exploit: No code on recordExposed services: 335

A fix is available — apply it.

Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.

Internet exposure · derived from Shodan data

335 internet-facing services (distinct ip:port) on record running a version that maps to CVE-2022-37436, in our KEV-Exposure radar’s Shodan-derived sample.

across 56 countries (United States, Germany, Japan, Poland, Netherlands)top: http_server
See the KEV-Exposure radar →Derived from Shodan data. Shodan data is owned by Shodan, which holds its copyright (© Shodan). EchelonGraph claims no ownership of it or copyright in it. Aggregate, host-redacted.

How it counts: every 12 hours, when Shodan query credits allow, the radar runs one Shodan query per tracked product, reads up to 100 ip:port services per query, and keeps a service when its banner version matches a CISA-KEV or high-EPSS CVE; a service is dropped when neither a search nor a Shodan InternetDB port re-check has refreshed it for 21 days. A re-check that finds the port still listed by Shodan InternetDB refreshes the service without re-reading the banner, so a patched service can stay counted while its port stays open. A count is a banner-version inference over a sample, not an exploit test and not an internet-wide census, and the unit is a service, not a machine: a machine answering on two ports counts twice.

CVSS v3
5.3
EG Score
7.0HIGHhigh confidence
EG Risk
61
EG Risk 61/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation56% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
56%
EPSS %ILE
99th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.0): severity, escalated by confirmed exploitation. This CVE's 7.0 is EPSS's lift toward 9.0 from its impact severity (EG Severity, CVSS 5.3 MEDIUM): a likelihood of exploitation, not impact.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
56% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 17, 2023

Last Modified

April 4, 2025

Advisory Details (2)

Auto-updated Nov 1, 2026
Patch available.
Web page

Apache HTTPD: Multiple Vulnerabilities (GLSA 202309-01) — Gentoo security

https://security.gentoo.org/glsa/202309-01
Web pageMentions a patch (unverified)

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

https://httpd.apache.org/security/vulnerabilities_24.html

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuapache2-bin (2.4.54-2ubuntu1.1) @ kinetic2026-11-01ubuntu
ubuntuapache2-bin (2.4.18-2ubuntu3.17+esm9) @ xenial2026-11-01ubuntu
redhatjbcs-httpd24-httpd-0:2.4.57-5.el7jbcs2023-08-15redhat
redhathttpd2023-08-15redhat
redhathttpd-0:2.4.53-7.el9_1.12023-02-28redhat
redhathttpd:2.4-8070020230131172653.bd1311ed2023-02-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(16 across 16 ecosystems)
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-r0: fixed in 2.4.55-r0
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.38-3 ... 2.4.38-3+deb10u8 (9 versions)
  • every version up to 2.4.38-3+deb10u9: fixed in 2.4.38-3+deb10u9
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.48-3.1 ... 2.4.55-1 (35 versions)
  • every version up to 2.4.56-1~deb11u1: fixed in 2.4.56-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-1: fixed in 2.4.55-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-1: fixed in 2.4.55-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.55-1: fixed in 2.4.55-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 91 of 177 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 9 repeat rows among the latest 100 are merged into the row they repeat. The 86 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 05:59 UTCEG score recompute
  2. 2026-11-01 05:59 UTCVendor advisory
  3. 2026-11-01 05:59 UTCGHSA enrichmentGHSA-3f78-wq4j-7vgr · GitHub CVSS 5.3
  4. 2026-10-31 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  5. 2026-10-30 16:30 UTCEPSS rescoreEPSS 56% · 99th percentile
  6. 2026-10-29 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  7. 2026-10-28 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  8. 2026-10-27 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  9. 2026-10-26 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  10. 2026-10-25 18:02 UTCEG score recompute
  11. 2026-10-25 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  12. 2026-10-24 19:25 UTCEG score recompute
  13. 2026-10-24 19:25 UTCVendor advisory
  14. 2026-10-24 19:25 UTCGHSA enrichmentGHSA-3f78-wq4j-7vgr · GitHub CVSS 5.3
  15. 2026-10-24 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  16. 2026-10-23 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  17. 2026-10-22 16:30 UTCEPSS rescoreEPSS 56% · 99th percentile
  18. 2026-10-21 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  19. 2026-10-20 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  20. 2026-10-19 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  21. 2026-10-18 08:30 UTCEG score recompute
  22. 2026-10-17 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  23. 2026-10-16 16:35 UTCEPSS rescoreEPSS 56% · 99th percentile
  24. 2026-10-15 16:28 UTCEPSS rescoreEPSS 56% · 99th percentile
  25. 2026-10-15 00:54 UTCOSV refresh
Show 66 more
  1. 2026-10-14 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  2. 2026-10-13 16:29 UTCEPSS rescoreEPSS 56% · 99th percentile
  3. 2026-10-12 18:50 UTCEG score recompute
  4. 2026-10-12 16:30 UTCEPSS rescoreEPSS 56% · 99th percentile
  5. 2026-10-11 23:13 UTCEG score recompute
  6. 2026-10-11 13:44 UTCEPSS rescoreEPSS 56% · 99th percentile
  7. 2026-10-10 19:56 UTCEPSS rescoreEPSS 56% · 99th percentile
  8. 2026-10-09 20:04 UTCEPSS rescoreEPSS 56% · 99th percentile
  9. 2026-10-08 16:40 UTCEPSS rescoreEPSS 56% · 99th percentile
  10. 2026-10-07 23:45 UTCEPSS rescoreEPSS 56% · 99th percentile
  11. 2026-10-06 15:14 UTCEPSS rescoreEPSS 56% · 99th percentile
  12. 2026-10-03 14:23 UTCEPSS rescoreEPSS 56% · 99th percentile
  13. 2026-10-02 16:23 UTCEPSS rescoreEPSS 56% · 99th percentile
  14. 2026-10-01 19:47 UTCEPSS rescoreEPSS 56% · 99th percentile
  15. 2026-09-30 16:01 UTCEG score recompute▼ 0.20
  16. 2026-09-30 15:00 UTCEPSS rescoreEPSS 56% · 99th percentile
  17. 2026-09-27 13:42 UTCEPSS rescoreEPSS 56% · 99th percentile
  18. 2026-09-24 14:00 UTCEPSS rescoreEPSS 61% · 99th percentile
  19. 2026-09-23 23:11 UTCOSV refresh
  20. 2026-09-22 14:45 UTCEPSS rescoreEPSS 61% · 99th percentile
  21. 2026-09-20 20:13 UTCEPSS rescoreEPSS 61% · 99th percentile
  22. 2026-09-17 19:24 UTCEPSS rescoreEPSS 61% · 99th percentile
  23. 2026-09-16 14:05 UTCEPSS rescoreEPSS 61% · 99th percentile
  24. 2026-09-15 03:07 UTCEPSS rescoreEPSS 61% · 99th percentile
  25. 2026-09-12 14:57 UTCEPSS rescoreEPSS 61% · 99th percentile
  26. 2026-09-11 09:33 UTCEPSS rescoreEPSS 61% · 99th percentile
  27. 2026-09-08 21:57 UTCEPSS rescoreEPSS 61% · 99th percentile
  28. 2026-09-06 13:45 UTCEPSS rescoreEPSS 61% · 99th percentile
  29. 2026-09-05 15:25 UTCEPSS rescoreEPSS 61% · 99th percentile
  30. 2026-09-04 17:29 UTCOSV refresh
  31. 2026-09-04 13:57 UTCEPSS rescoreEPSS 58% · 99th percentile
  32. 2026-09-02 14:09 UTCEPSS rescoreEPSS 58% · 99th percentile
  33. 2026-08-30 19:14 UTCEPSS rescoreEPSS 58% · 99th percentile
  34. 2026-08-30 01:19 UTCEPSS rescoreEPSS 58% · 99th percentile
  35. 2026-08-28 21:38 UTCEPSS rescoreEPSS 58% · 99th percentile
  36. 2026-08-27 14:22 UTCEPSS rescoreEPSS 58% · 99th percentile
  37. 2026-08-26 14:43 UTCEPSS rescoreEPSS 58% · 99th percentile
  38. 2026-08-25 13:46 UTCEPSS rescoreEPSS 58% · 99th percentile
  39. 2026-08-24 14:13 UTCEPSS rescoreEPSS 58% · 99th percentile
  40. 2026-08-21 23:46 UTCEPSS rescoreEPSS 58% · 99th percentile
  41. 2026-08-20 22:52 UTCEPSS rescoreEPSS 58% · 99th percentile
  42. 2026-08-19 17:01 UTCEPSS rescoreEPSS 58% · 99th percentile
  43. 2026-08-18 13:45 UTCEPSS rescoreEPSS 58% · 99th percentile
  44. 2026-08-18 04:52 UTCOSV refresh
  45. 2026-08-17 13:44 UTCEPSS rescoreEPSS 58% · 99th percentile
  46. 2026-08-16 02:11 UTCEPSS rescoreEPSS 58% · 99th percentile
  47. 2026-08-15 01:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  48. 2026-08-13 21:58 UTCEPSS rescoreEPSS 58% · 99th percentile
  49. 2026-08-12 13:48 UTCEPSS rescoreEPSS 58% · 99th percentile
  50. 2026-08-11 13:39 UTCEPSS rescoreEPSS 58% · 99th percentile
  51. 2026-08-08 16:34 UTCEPSS rescoreEPSS 58% · 98th percentile
  52. 2026-08-07 16:24 UTCEPSS rescoreEPSS 58% · 98th percentile
  53. 2026-08-05 19:15 UTCEPSS rescoreEPSS 58% · 98th percentile
  54. 2026-08-02 23:57 UTCOSV refresh
  55. 2026-07-30 16:25 UTCEPSS rescoreEPSS 58% · 98th percentile
  56. 2026-07-30 01:28 UTCEPSS rescoreEPSS 58% · 98th percentile
  57. 2026-07-28 15:33 UTCEPSS rescoreEPSS 58% · 98th percentile
  58. 2026-07-26 14:52 UTCEPSS rescoreEPSS 58% · 98th percentile
  59. 2026-07-25 14:15 UTCEPSS rescoreEPSS 58% · 98th percentile
  60. 2026-07-24 14:15 UTCEPSS rescoreEPSS 58% · 98th percentile
  61. 2026-07-23 14:16 UTCEPSS rescoreEPSS 58% · 98th percentile
  62. 2026-07-23 02:13 UTCEG score recompute▲ 1.90
  63. 2026-07-22 23:00 UTCEG score recompute
  64. 2026-07-22 14:06 UTCEPSS rescoreEPSS 58% · 98th percentile
  65. 2026-07-21 15:22 UTCEPSS rescoreEPSS 58% · 98th percentile
  66. 2026-07-20 17:05 UTCEPSS rescoreEPSS 58% · 98th percentile

Frequently asked(5)

What is CVE-2022-37436?
CVE-2022-37436 is a high-severity vulnerability; its CVE record was published on January 17, 2023. Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.
When was the CVE record for CVE-2022-37436 published?
The CVE record for CVE-2022-37436 was published on January 17, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of April 4, 2025; the record at its source may have been updated since.
Is CVE-2022-37436 actively exploited?
CVE-2022-37436 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-37436?
CVE-2022-37436 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 7.0 (HIGH).
How do I remediate CVE-2022-37436?
A fix for CVE-2022-37436 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-37436 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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