CVE-2026-44631

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH 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 — Patch released this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 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(high)
EPSS
38.4%
KEV
Not listed

Published

June 8, 2026

Last Modified

June 11, 2026

Advisory Details (2)

Auto-updated Jun 20, 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(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhathttpd-0:2.4.63-13.el10_2.42026-07-01redhat

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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 67× in last 7d / 285× 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 285 total refreshes for this CVE.

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

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 June 11, 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 38.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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