CVE-2026-34356

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie*

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

Users are recommended to upgrade to version 2.4.68, which fixes the issue.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
48.7%
KEV
Not listed

Published

June 8, 2026

Last Modified

June 9, 2026

Advisory Details (1)

Auto-updated Jun 8, 2026
⚠️ Active exploitation confirmed. Patch available.
generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

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

Vendor Advisories for CVE-2026-34356(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 / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-utils (2.4.66-2ubuntu2.4) @ resolute2026-07-16ubuntu
redhathttpd-0:2.4.63-13.el10_2.42026-07-01redhat
redhathttpd-main-2.4.68-1.hum12026-06-10redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 10× in last 7d / 89× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 133 total refreshes for this CVE.

  1. 2026-07-23 03:09 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-16 11:53 UTCVendor advisory
  10. 2026-07-16 11:53 UTCGHSA enrichment
  11. 2026-07-15 22:27 UTCVendor advisory
  12. 2026-07-15 22:27 UTCGHSA enrichment
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 02:00 UTCEPSS rescore
  16. 2026-07-14 15:06 UTCVendor advisory
  17. 2026-07-14 15:06 UTCGHSA enrichment
  18. 2026-07-14 02:49 UTCVendor advisory
  19. 2026-07-14 02:49 UTCGHSA enrichment
  20. 2026-07-13 22:30 UTCEPSS rescore
  21. 2026-07-13 06:13 UTCEPSS rescore
  22. 2026-07-13 06:13 UTCEPSS rescore
  23. 2026-07-12 11:31 UTCVendor advisory
  24. 2026-07-12 11:31 UTCGHSA enrichment
  25. 2026-07-12 05:46 UTCEPSS rescore
Show 75 more
  1. 2026-07-11 22:15 UTCVendor advisory
  2. 2026-07-11 22:15 UTCGHSA enrichment
  3. 2026-07-11 09:46 UTCVendor advisory
  4. 2026-07-11 09:46 UTCGHSA enrichment
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-10 21:30 UTCVendor advisory
  7. 2026-07-10 21:30 UTCGHSA enrichment
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 04:50 UTCVendor advisory
  10. 2026-07-09 04:50 UTCGHSA enrichment
  11. 2026-07-08 15:57 UTCVendor advisory
  12. 2026-07-08 15:57 UTCGHSA enrichment
  13. 2026-07-08 15:15 UTCEPSS rescore
  14. 2026-07-08 03:32 UTCVendor advisory
  15. 2026-07-08 03:32 UTCGHSA enrichment
  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-05 17:40 UTCVendor advisory
  22. 2026-07-05 17:40 UTCGHSA enrichment
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 15:06 UTCVendor advisory
  25. 2026-07-04 15:06 UTCGHSA enrichment
  26. 2026-07-04 06:31 UTCEPSS rescore
  27. 2026-07-03 21:49 UTCVendor advisory
  28. 2026-07-03 21:49 UTCGHSA enrichment
  29. 2026-07-03 09:26 UTCVendor advisory
  30. 2026-07-03 09:26 UTCGHSA enrichment
  31. 2026-07-02 19:48 UTCVendor advisory
  32. 2026-07-02 19:48 UTCGHSA enrichment
  33. 2026-07-02 07:32 UTCVendor advisory
  34. 2026-07-02 07:32 UTCGHSA enrichment
  35. 2026-07-01 19:15 UTCGHSA enrichment
  36. 2026-07-01 15:06 UTCEPSS rescore
  37. 2026-07-01 06:57 UTCGHSA enrichment
  38. 2026-06-30 23:22 UTCEPSS rescore
  39. 2026-06-30 16:30 UTCGHSA enrichment
  40. 2026-06-30 02:50 UTCGHSA enrichment
  41. 2026-06-29 14:33 UTCGHSA enrichment
  42. 2026-06-29 14:06 UTCEPSS rescore
  43. 2026-06-29 14:06 UTCEPSS rescore
  44. 2026-06-29 02:17 UTCGHSA enrichment
  45. 2026-06-28 14:07 UTCEPSS rescore
  46. 2026-06-28 14:07 UTCEPSS rescore
  47. 2026-06-28 13:59 UTCGHSA enrichment
  48. 2026-06-28 04:56 UTCEPSS rescore
  49. 2026-06-28 04:56 UTCEPSS rescore
  50. 2026-06-28 01:43 UTCGHSA enrichment
  51. 2026-06-27 13:21 UTCGHSA enrichment
  52. 2026-06-27 03:08 UTCEPSS rescore
  53. 2026-06-27 01:05 UTCGHSA enrichment
  54. 2026-06-26 12:49 UTCGHSA enrichment
  55. 2026-06-25 21:51 UTCGHSA enrichment
  56. 2026-06-25 13:49 UTCEPSS rescore
  57. 2026-06-25 13:49 UTCEPSS rescore
  58. 2026-06-25 09:34 UTCGHSA enrichment
  59. 2026-06-24 21:18 UTCGHSA enrichment
  60. 2026-06-24 14:05 UTCEPSS rescore
  61. 2026-06-24 08:17 UTCGHSA enrichment
  62. 2026-06-23 21:33 UTCEPSS rescore
  63. 2026-06-23 21:33 UTCEPSS rescore
  64. 2026-06-23 16:09 UTCGHSA enrichment
  65. 2026-06-23 02:28 UTCGHSA enrichment
  66. 2026-06-22 14:25 UTCEPSS rescore
  67. 2026-06-22 14:25 UTCEPSS rescore
  68. 2026-06-22 14:11 UTCGHSA enrichment
  69. 2026-06-21 20:19 UTCGHSA enrichment
  70. 2026-06-21 14:56 UTCEPSS rescore
  71. 2026-06-21 14:56 UTCEPSS rescore
  72. 2026-06-21 05:21 UTCGHSA enrichment
  73. 2026-06-21 01:59 UTCEPSS rescore
  74. 2026-06-20 15:52 UTCGHSA enrichment
  75. 2026-06-20 02:48 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-34356?
CVE-2026-34356 is a high vulnerability published on June 8, 2026. Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie* This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.
When was CVE-2026-34356 disclosed?
CVE-2026-34356 was first published in the National Vulnerability Database on June 8, 2026, with the most recent update on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34356 actively exploited?
CVE-2026-34356 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34356?
CVE-2026-34356 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-34356?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34356, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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