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 — 3 sources updated 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(medium)
EPSS
39.0%
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(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibapache2-mod-proxy-uwsgi (2.4.52-1ubuntu4.23) @ jammy2026-07-16ubuntu
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(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 13× in last 7d / 147× 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 226 total refreshes for this CVE.

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

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 39.0% 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

Explore the affected products and dependency analysis for CVE-2026-44631

Explore →

Is Your Infrastructure Affected by CVE-2026-44631?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs