Is there a public exploit for CVE-2026-61812?

No public exploit for CVE-2026-61812 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-61812?

CVE-2026-61812 scores CVSS 6.3 (v4.0), rated medium.

What does CVE-2026-61812 affect?

CVE-2026-61812 affects owasp-modsecurity ModSecurity.

6.3 Medium

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx.

CVE-2026-61812

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 2.9.15 and 3.0.17, t:htmlEntityDecode recognizes only a small subset of named HTML entities, so rules that depend on the transformation can inspect different bytes than a browser or backend. Attackers can encode ASCII separators and operators with unhandled entity names, including aliases, to bypass rules that depend on the transformation. The v3 decoder also accepts prefix matches instead of requiring an exact entity-token length, which can transform invalid longer names into different bytes. This issue is fixed in versions 2.9.15 and 3.0.17.

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 9 November 2026
Last updated: 9 November 2026
Affected: owasp-modsecurity · ModSecurity
Assigner: GitHub_M

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

At the source

EUVD (ENISA)

References

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