CVE-2026-34355

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 — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this 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 PROB
1%
EPSS %ILE
66%
KEV
Not listed

Published

June 8, 2026

Last Modified

September 14, 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-2026-34355(13)

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

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
redhathttpd-0:2.4.53-11.el9_2.152026-09-14redhat
ubuntulibapache2-mod-proxy-uwsgi (2.4.58-1ubuntu8.15) @ noble2026-09-14ubuntu
ubuntuapache2-utils (2.4.18-2ubuntu3.17+esm19) @ xenial2026-09-14ubuntu
redhathttpd-0:2.4.57-11.el9_4.52026-09-10redhat
redhathttpd-0:2.4.62-4.el9_6.62026-09-01redhat
redhatjbcs-httpd24-mod_security-0:2.9.6-19.el8jbcs2026-08-19redhat
redhatpatch2026-08-19redhat
redhatinsights-proxy/insights-proxy-container-rhel9:17864336562026-08-11redhat
redhathttpd-0:2.4.63-1.el10_0.42026-07-28redhat
redhathttpd:2.4-8100020260714175253.489197e62026-07-21redhat
redhathttpd-0:2.4.62-13.el9_8.52026-07-20redhat
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.

Affected Packages

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.68-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.68-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.68-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.68-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
apache22.4.48-3.1 ... 2.4.67-1~deb11u2 (84 versions)2.4.67-1~deb11u3—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
apache22.4.57-2 ... 2.4.67-2 (53 versions)2.4.68-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
apache22.4.65-2 ... 2.4.68-1~deb12u1 (27 versions)2.4.68-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
apache22.4.65-2 ... 2.4.68-1~deb13u1 (28 versions)2.4.68-1—

Weakness Classification(2)

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 15× in last 7d / 72× 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 339 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-34355?
CVE-2026-34355 is a high vulnerability published on June 8, 2026. A buffer overflow in modproxyhtml in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this issue.
When was CVE-2026-34355 disclosed?
CVE-2026-34355 was first published in the National Vulnerability Database on June 8, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34355 actively exploited?
CVE-2026-34355 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 34.3% of all scored CVEs.
What is the CVSS score of CVE-2026-34355?
CVE-2026-34355 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-34355?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34355, 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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