CVE-2025-47947

Description

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.

Reserved 2025-05-14 | Published 2025-05-21 | Updated 2025-05-22 | Assigner GitHub_M

Problem types

CWE-1050: Excessive Platform Resource Consumption within a Loop

Product status

<= 2.9.8
affected

References

github.com/...curity/security/advisories/GHSA-859r-vvv8-rm8r

github.com/owasp-modsecurity/ModSecurity/pull/3389

cve.org (CVE-2025-47947)

nvd.nist.gov (CVE-2025-47947)

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