CVE-2026-73637

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-10-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — Patch released this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.

Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVSS v3
7.3
EG Score
7.3HIGHhigh confidence
EG Risk
48
EG Risk 48/100CISA SSVC

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
Severity73% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 1, 2026

Last Modified

October 1, 2026

Advisory Details (1)

Auto-updated Oct 1, 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-2026-73637(1)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhathttpd-main-2.4.69-1.hum12026-10-02redhat

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

(7 across 7 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.69-r0: fixed in 2.4.69-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.69-r0: fixed in 2.4.69-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.69-r0: fixed in 2.4.69-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.69-r0: fixed in 2.4.69-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.57-2 ... 2.4.69-1 (58 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.65-2 ... 2.4.69-1 (31 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.65-2 ... 2.4.68-2 (30 versions)
  • every version up to 2.4.69-1: fixed in 2.4.69-1
—

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 25× in last 7d / 25× 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.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:25 UTCVendor advisory
  3. 2026-10-04 22:25 UTCGHSA enrichment
  4. 2026-10-04 10:15 UTCVendor advisory
  5. 2026-10-04 10:15 UTCGHSA enrichment
  6. 2026-10-03 22:05 UTCEG score recompute
  7. 2026-10-03 22:05 UTCVendor advisory
  8. 2026-10-03 22:05 UTCGHSA enrichment
  9. 2026-10-03 14:26 UTCEPSS rescore
  10. 2026-10-03 09:54 UTCVendor advisory
  11. 2026-10-03 09:54 UTCGHSA enrichment
  12. 2026-10-02 21:41 UTCEG score recompute
  13. 2026-10-02 21:41 UTCVendor advisory
  14. 2026-10-02 21:41 UTCGHSA enrichment
  15. 2026-10-02 09:31 UTCEG score recompute
  16. 2026-10-02 09:31 UTCGHSA enrichment
  17. 2026-10-01 21:20 UTCGHSA enrichment
  18. 2026-10-01 20:33 UTCGHSA enrichment
  19. 2026-10-01 20:29 UTCGHSA enrichment
  20. 2026-10-01 19:51 UTCEG score recompute▲ 7.30
  21. 2026-10-01 19:51 UTCGHSA enrichment
  22. 2026-10-01 19:50 UTCMITRE cvelistV5CVSS v3 → 7.3 · severity → HIGH
  23. 2026-10-01 17:27 UTCNVD update
  24. 2026-10-01 16:27 UTCEG score recompute
  25. 2026-10-01 16:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-73637?
CVE-2026-73637 is a high vulnerability published on October 1, 2026. Use after free in modauthdigest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime…
When was CVE-2026-73637 disclosed?
CVE-2026-73637 was first published on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73637 actively exploited?
CVE-2026-73637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73637?
CVE-2026-73637 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-73637?
A fix for CVE-2026-73637 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73637 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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