Quick answers
- Is CVE-2026-73637 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-73637 being exploited in the wild.
- How severe is CVE-2026-73637?
- High severity, with a CVSS score of 7.3, published 1 October 2026.
- Which products and versions are affected?
- Apache Software Foundation HTTP Server 2.4.0 through 2.4.68.
- Is there a fix for CVE-2026-73637?
- Yes: fixed in 2.4.69. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-73637 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-73637?
- Check whether you run Apache Software Foundation HTTP Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 2.4.69
Technical details
Use-after-free in mod_auth_digest triggered by concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. The vulnerability allows unauthenticated remote clients to corrupt authentication state from the network without authentication preconditions. The flaw results in denial of service through authentication disruption.
Affected products
- Apache Software Foundation HTTP Server 2.4.0 through 2.4.68
Timeline
- 2026-07-18: disclosed: Report received
- 2026-10-01: patched: Fixed in 2.4.x
- 2026-10-01: advisory: Apache HTTP Server 2.4.69 released