Update your nginx instances
cross-posted from: https://lemmy.world/post/46851448
- Affected an non-affected versions https://nginx.org/en/security_advisories.html
- CVE record https://www.cve.org/CVERecord?id=CVE-2026-42945
- CVE details https://nvd.nist.gov/vuln/detail/CVE-2026-42945
- PoC https://github.com/DepthFirstDisclosures/Nginx-Rift
CVE - Common Vulnerabilities and Exposures system
RCE - Remote Code Execution
PoC - Proof of Concept
Seems to be specific to rewrites using an un-named capture.
grep -rnE "\$[0-9.*].*\?" /etc/ngnixshould show if you have any potentially vulnerable directives in your config.