CVE-2026-73637
CVE-2026-73637: 2 tracked advisory records across Apache, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityHigh7.3
High [CVE-2026-73637] 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
CVE-2026-73637Source published Source updated
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.
- Related products — impact not confirmed
- Apache HTTP Server
- Source-reported affected versions
- Apache HTTP Server 2.4.0 through 2.4.68
- Source-reported fixed versions
- 2.4.69
- Mitigation guidance
- Users are recommended to upgrade to version 2.4.69, which fixes this issue.
Red Hat
1 advisory- Advisory severityMedium5.6
Medium [CVE-2026-73637] Authentication state corruption via concurrent Digest authentication requests
CVE-2026-73637Source published Source updated
Authentication state corruption via concurrent Digest authentication requests. Red Hat rates this moderate (CVSS 5.6). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:74858 with package httpd-main-2.4.69-1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 3 more.
- Related products — impact not confirmed
- Red Hat Hardened Images
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
3 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- httpd-main-2.4.69-1.hum1
- RHSA-2026:74858
- Mitigation guidance
- To mitigate this issue, apply one of the following configuration options: 1. Disable `mod_auth_digest` if Digest authentication is not required: In `/etc/httpd/conf.modules.d/00-base.conf` (or the relevant module configuration file), comment out the loading of the module: ``` # LoadModule auth_digest_module modules/mod_auth_digest.so ``` 2. If Digest authentication is required, ensure vulnerable settings are disabled: Ensure `AuthDigestNcCheck` is set to `Off` (or removed, as `Off` is the default) and ensure `AuthDigestNonceLifetime` is not set to `0` (the default value is 300 seconds). After applying configuration adjustments, reload the web server: ``` systemctl reload httpd ``` Warning: Reloading or restarting the `httpd` service may briefly disrupt active client connections. Disabling `mod_auth_digest` will cause authentication failures for resources configured with `AuthType Digest`.
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