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
62%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 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(6)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-utils (2.4.18-2ubuntu3.17+esm19) @ xenial2026-07-26ubuntu
ubuntuapache2-utils (2.4.66-2ubuntu2.4) @ resolute2026-07-26ubuntu
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.

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 21× in last 7d / 92× 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 150 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 July 23, 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 38.1% 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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