CVE-2026-52845
CVE-2026-52845: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh8.1
High [CVE-2026-52845] Remote client can inject or override identity headers via header normalization
CVE-2026-52845Source published Source updated
Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, forward_auth copy_headers deletes the exact client-supplied identity header before copying the trusted value from the auth gateway. But when the request later goes through php_fastcgi, Caddy normalizes HTTP headers into CGI variables by replacing - with _. This lets a client send an underscore alias that survives the forward_auth delete step but becomes the same PHP/FastCGI variable. Result: a remote client can inject or sometimes override identity/group headers trusted by PHP/FastCGI applications behind Caddy. This vulnerability is fixed in 2.11.4. A remote attacker can exploit a vulnerability in the `forward_auth` `copy_headers` functionality. Red Hat severity: Important — CVSS 8.1…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- < 2.11.4
- Source-reported fixed versions
- 2.11.4
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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