8.1

CVE-2026-73636: apache software foundation apache http server Authentication Bypass by Capture-replay

CVSS: 8.1v3.1HighAnalyzed
AliasesALPINE-CVE-2026-73636UBUNTU-CVE-2026-73636DEBIAN-CVE-2026-73636
Published 01-10-2026Last modified 01-10-2026
Open JSON

Vulnerability summary

CVE-2026-73636 is a high (CVSS 8.1) Authentication Bypass by Capture-replay vulnerability in apache software foundation apache http server. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.9% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
MGASA-2026-0502RHSA-2026:74858USN-8931-1

Timeline

  1. 01-10-2026
    PublishedVulnerability first disclosed.
  2. 01-10-2026
    Last modifiedVulnerability information updated.

Description

Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

02-10-202618-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • apache2< 2.4.69-r0
Apache1 product
Apache software foundation1 product
Debian1 product
  • apache2All versions (No fix recorded) | < 2.4.69-1~deb13u1 | < 2.4.69-1
Ubuntu1 product
  • apache2All versions (No fix recorded) | < 2.4.7-1ubuntu4.22+esm17 | < 2.4.18-2ubuntu3.17+esm22 | < 2.4.29-1ubuntu4.27+esm13 | < 2.4.41-4ubuntu3.23+esm9 | < 2.4.52-1ubuntu4.25 | < 2.4.58-1ubuntu8.17 | < 2.4.66-2ubuntu2.6

5 vendors · 5 products

References

8 links