CVE-2026-44631

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.

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
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Aug 22, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

oss-security - CVE-2026-44631: Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow

http://www.openwall.com/lists/oss-security/2026/06/08/14
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-2026-44631(8)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-utils (2.4.18-2ubuntu3.17+esm19) @ xenial2026-08-25ubuntu
ubuntuapache2-utils (2.4.66-2ubuntu2.4) @ resolute2026-08-25ubuntu
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(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 38× in last 7d / 263× 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 501 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-44631?
CVE-2026-44631 is a critical vulnerability published on June 8, 2026. Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. 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-2026-44631 disclosed?
CVE-2026-44631 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-2026-44631 actively exploited?
CVE-2026-44631 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 59.2% of all scored CVEs.
What is the CVSS score of CVE-2026-44631?
CVE-2026-44631 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-44631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44631, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-44631

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