HIGH 8.8 Microsoft PoC

CVE-2026-23918

Apache HTTP Server: http2: double free and possible RCE on early reset

Microsoft Security Update 2026-May: Apache HTTP Server: http2: double free and possible RCE on early reset

Affected Products

cbl2 httpd 2.4.66-1 on CBL Mariner 2.0
azl3 httpd 2.4.66-1 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23918
https://nvd.nist.gov/vuln/detail/CVE-2026-23918

Published: 2026-05-12 · Source: Microsoft · Feed updated: 2026-08-04

This high severity vulnerability with a CVSS score of 8.8 was published on 2026-05-12 via Microsoft. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 49.7% (top 1% of all CVEs by exploitation probability). Affected: cbl2 httpd 2.4.66-1 on CBL Mariner 2.0, azl3 httpd 2.4.66-1 on Azure Linux 3.0.

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