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
42%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Sep 12, 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(13)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-utils (2.4.66-2ubuntu2.4) @ resolute2026-09-14ubuntu
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-httpd2026-08-19redhat
redhatjbcs-httpd24-mod_security-0:2.9.6-19.el8jbcs2026-08-19redhat
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(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 11× in last 7d / 65× 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 529 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-14 09:05 UTCVendor advisory
  6. 2026-09-14 09:05 UTCGHSA enrichment
  7. 2026-09-14 04:53 UTCEG score recompute
  8. 2026-09-14 04:53 UTCVendor advisory
  9. 2026-09-14 04:53 UTCGHSA enrichment
  10. 2026-09-13 16:47 UTCEPSS rescore
  11. 2026-09-12 15:01 UTCEPSS rescore
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 09:37 UTCEPSS rescore
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-08 22:00 UTCEPSS rescore
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-06 13:47 UTCEPSS rescore
  18. 2026-09-04 05:06 UTCEPSS rescore
  19. 2026-09-02 14:12 UTCEPSS rescore
  20. 2026-09-01 13:54 UTCEPSS rescore
  21. 2026-08-31 02:09 UTCEG score recompute
  22. 2026-08-31 02:09 UTCVendor advisory
  23. 2026-08-31 02:09 UTCGHSA enrichment
  24. 2026-08-30 19:17 UTCEPSS rescore
  25. 2026-08-30 01:22 UTCEPSS rescore
Show 75 more
  1. 2026-08-28 21:41 UTCEPSS rescore
  2. 2026-08-27 14:25 UTCEPSS rescore
  3. 2026-08-26 14:46 UTCEPSS rescore
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-25 05:43 UTCVendor advisory
  6. 2026-08-25 05:43 UTCGHSA enrichment
  7. 2026-08-25 01:33 UTCEG score recompute
  8. 2026-08-25 01:33 UTCVendor advisory
  9. 2026-08-25 01:33 UTCGHSA enrichment
  10. 2026-08-24 00:41 UTCVendor advisory
  11. 2026-08-24 00:41 UTCGHSA enrichment
  12. 2026-08-23 20:31 UTCVendor advisory
  13. 2026-08-23 20:31 UTCGHSA enrichment
  14. 2026-08-23 16:20 UTCVendor advisory
  15. 2026-08-23 16:20 UTCGHSA enrichment
  16. 2026-08-23 11:52 UTCEG score recompute
  17. 2026-08-23 11:52 UTCVendor advisory
  18. 2026-08-23 11:52 UTCGHSA enrichment
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-22 00:06 UTCEG score recompute
  21. 2026-08-22 00:06 UTCVendor advisory
  22. 2026-08-22 00:06 UTCGHSA enrichment
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-21 19:55 UTCVendor advisory
  25. 2026-08-21 19:55 UTCGHSA enrichment
  26. 2026-08-21 12:43 UTCVendor advisory
  27. 2026-08-21 12:43 UTCGHSA enrichment
  28. 2026-08-21 06:42 UTCVendor advisory
  29. 2026-08-21 06:42 UTCGHSA enrichment
  30. 2026-08-21 02:11 UTCEG score recompute
  31. 2026-08-21 02:11 UTCVendor advisory
  32. 2026-08-21 02:11 UTCGHSA enrichment
  33. 2026-08-20 22:55 UTCEPSS rescore
  34. 2026-08-20 21:37 UTCVendor advisory
  35. 2026-08-20 21:37 UTCGHSA enrichment
  36. 2026-08-20 17:26 UTCVendor advisory
  37. 2026-08-20 17:26 UTCGHSA enrichment
  38. 2026-08-20 09:31 UTCEG score recompute
  39. 2026-08-20 09:31 UTCVendor advisory
  40. 2026-08-20 09:31 UTCGHSA enrichment
  41. 2026-08-19 17:04 UTCEPSS rescore
  42. 2026-08-18 13:48 UTCEPSS rescore
  43. 2026-08-17 15:17 UTCEG score recompute
  44. 2026-08-17 15:17 UTCVendor advisory
  45. 2026-08-17 15:17 UTCGHSA enrichment
  46. 2026-08-17 13:47 UTCEPSS rescore
  47. 2026-08-17 10:50 UTCVendor advisory
  48. 2026-08-17 10:50 UTCGHSA enrichment
  49. 2026-08-17 06:40 UTCVendor advisory
  50. 2026-08-17 06:40 UTCGHSA enrichment
  51. 2026-08-17 01:57 UTCEG score recompute
  52. 2026-08-17 01:57 UTCVendor advisory
  53. 2026-08-17 01:57 UTCGHSA enrichment
  54. 2026-08-16 14:56 UTCEPSS rescore
  55. 2026-08-16 14:26 UTCVendor advisory
  56. 2026-08-16 14:26 UTCGHSA enrichment
  57. 2026-08-16 09:37 UTCVendor advisory
  58. 2026-08-16 09:37 UTCGHSA enrichment
  59. 2026-08-16 05:26 UTCEG score recompute
  60. 2026-08-16 05:26 UTCVendor advisory
  61. 2026-08-16 05:26 UTCGHSA enrichment
  62. 2026-08-16 02:14 UTCEPSS rescore
  63. 2026-08-16 01:16 UTCVendor advisory
  64. 2026-08-16 01:16 UTCGHSA enrichment
  65. 2026-08-15 16:12 UTCVendor advisory
  66. 2026-08-15 16:12 UTCGHSA enrichment
  67. 2026-08-15 12:00 UTCVendor advisory
  68. 2026-08-15 12:00 UTCGHSA enrichment
  69. 2026-08-15 03:45 UTCEG score recompute
  70. 2026-08-15 03:45 UTCVendor advisory
  71. 2026-08-15 03:45 UTCGHSA enrichment
  72. 2026-08-15 01:30 UTCEPSS rescore
  73. 2026-08-14 23:34 UTCVendor advisory
  74. 2026-08-14 23:34 UTCGHSA enrichment
  75. 2026-08-14 19:23 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 57.9% 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

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