CVE-2026-93682

MEDIUMPre-NVD 5.85.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (26th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-87321 (ENISA EUVD)Source: ENISA EUVD

5.8EG
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).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.

CVSS v3
5.8
EG Score
5.8MEDIUMmedium confidence
EG Risk
57
EG Risk 57/100

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)
Severity58% × 45%
Impact severity (EG Severity): CVSS 5.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (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
0.3%
EPSS %ILE
26th
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 (5.8): severity, escalated by confirmed exploitation. This CVE's 5.8 is its impact severity (EG Severity), not escalated.

EG Severity
5.8 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. 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 public PoC (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

September 25, 2026

Last Modified

October 23, 2026

Advisory Details (1)

Auto-updated Sep 25, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Out-of-bounds read in the HTTP stream wrapper when following a redirect with an empty Location header · Advisory · php/php-src · GitHub

https://github.com/php/php-src/security/advisories/GHSA-7875-c8px-7q5f

Vendor Advisories for CVE-2026-93682(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuphp7.2-zip (7.2.24-0ubuntu0.18.04.17+esm13) @ bionic2026-10-23ubuntu
redhatphp:7.4-8100020261021081045.f79986652026-10-21redhat
redhatphp-main-8.5.11-2.hum12026-09-23redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
php8.28.2.10-1 ... 8.2.7-1~deb12u1 (29 versions)
  • every version up to 8.2.34-1~deb12u1: fixed in 8.2.34-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
php8.48.4.11-1 ... 8.4.24-1~deb13u1 (11 versions)
  • every version up to 8.4.26-1~deb13u1: fixed in 8.4.26-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
php8.48.4.11-1 ... 8.4.26-1~deb13u1 (12 versions)
  • every version up to 8.4.26-1: fixed in 8.4.26-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 7× in last 7d / 59× 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.

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. 1 repeat row among the latest 85 is merged into the row it repeats.

  1. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  7. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-25 13:49 UTCEG score recompute
  10. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-23 15:06 UTCEG score recompute
  13. 2026-10-23 15:06 UTCVendor advisory
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  15. 2026-10-22 12:27 UTCEG score recompute
  16. 2026-10-22 12:27 UTCVendor advisory
  17. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  20. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  21. 2026-10-18 02:58 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  24. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  25. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.4% · 27th percentile
Show 59 more
  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  3. 2026-10-12 14:42 UTCEG score recompute
  4. 2026-10-11 19:12 UTCEG score recompute
  5. 2026-10-11 16:28 UTCEG score recompute
  6. 2026-10-11 16:20 UTCEG score recompute
  7. 2026-10-11 16:20 UTCVendor advisory
  8. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  9. 2026-10-11 13:41 UTCEG score recompute
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-10 18:35 UTCVendor advisory
  12. 2026-10-09 20:54 UTCEG score recompute
  13. 2026-10-09 20:54 UTCVendor advisory
  14. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  15. 2026-10-08 23:13 UTCEG score recompute
  16. 2026-10-08 23:13 UTCVendor advisory
  17. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-10-08 01:33 UTCEG score recompute
  19. 2026-10-08 01:33 UTCVendor advisory
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  21. 2026-10-07 03:52 UTCEG score recompute
  22. 2026-10-07 03:52 UTCVendor advisory
  23. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  24. 2026-10-06 06:12 UTCEG score recompute
  25. 2026-10-06 06:12 UTCVendor advisory
  26. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  27. 2026-10-05 08:31 UTCEG score recompute
  28. 2026-10-05 08:31 UTCVendor advisory
  29. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  30. 2026-10-04 10:50 UTCEG score recompute
  31. 2026-10-04 10:50 UTCVendor advisory
  32. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  33. 2026-10-03 13:07 UTCEG score recompute
  34. 2026-10-03 13:07 UTCVendor advisory
  35. 2026-10-02 15:27 UTCEG score recompute
  36. 2026-10-02 15:27 UTCVendor advisory
  37. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  38. 2026-10-01 17:42 UTCVendor advisory
  39. 2026-09-30 19:56 UTCEG score recompute
  40. 2026-09-30 19:56 UTCVendor advisory
  41. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  42. 2026-09-29 22:16 UTCEG score recompute
  43. 2026-09-29 22:16 UTCVendor advisory
  44. 2026-09-29 12:04 UTCEG score recompute
  45. 2026-09-29 12:04 UTCVendor advisory
  46. 2026-09-28 14:23 UTCEG score recompute
  47. 2026-09-28 14:23 UTCVendor advisory
  48. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  49. 2026-09-27 16:42 UTCEG score recompute
  50. 2026-09-27 16:42 UTCVendor advisory
  51. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  52. 2026-09-26 19:02 UTCEG score recompute
  53. 2026-09-26 19:02 UTCVendor advisory
  54. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  55. 2026-09-25 21:19 UTCEG score recompute
  56. 2026-09-25 20:47 UTCEG score recompute
  57. 2026-09-25 20:37 UTCEG score recompute
  58. 2026-09-25 20:07 UTCEG score recomputeFirst assessed: 5.8 MEDIUM
  59. 2026-09-25 20:04 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-93682?
CVE-2026-93682 is a medium-severity vulnerability; its CVE record was published on September 25, 2026. When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server…
When was the CVE record for CVE-2026-93682 published?
The CVE record for CVE-2026-93682 was published on September 25, 2026. 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 October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-93682 actively exploited?
CVE-2026-93682 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-93682?
CVE-2026-93682 has a CVSS base score of 5.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-93682?
A fix for CVE-2026-93682 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-93682 are linked in the Vendor Advisories panel on this page.

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