| Name | CVE-2026-34475 |
| Description | Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1132231 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| varnish (PTS) | bullseye | 6.5.1-1+deb11u3 | vulnerable |
| bullseye (security) | 6.5.1-1+deb11u5 | vulnerable |
| bookworm, bookworm (security) | 7.1.1-2+deb12u1 | vulnerable |
| trixie | 7.7.0-3 | vulnerable |
| forky, sid | 7.7.3-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| varnish | source | (unstable) | (unfixed) | | | 1132231 |
Notes
[trixie] - varnish <no-dsa> (Minor issue; can be mitigated by VCL rule)
[bookworm] - varnish <no-dsa> (Minor issue; can be mitigated by VCL rule)
[bullseye] - varnish <postponed> (Minor issue; can be mitigated by VCL rule)
https://vinyl-cache.org/security/VSV00018.html