| Name | CVE-2025-9901 |
| Description | A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1113991, 1113992 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libsoup2.4 (PTS) | bullseye | 2.72.0-2 | vulnerable |
| bullseye (security) | 2.72.0-2+deb11u2 | vulnerable | |
| bookworm | 2.74.3-1+deb12u1 | vulnerable | |
| forky, sid, trixie | 2.74.3-10.1 | vulnerable | |
| libsoup3 (PTS) | bookworm | 3.2.3-0+deb12u2 | vulnerable |
| trixie | 3.6.5-3 | vulnerable | |
| forky, sid | 3.6.5-4 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libsoup2.4 | source | (unstable) | (unfixed) | 1113992 | ||
| libsoup3 | source | (unstable) | (unfixed) | 1113991 |
[trixie] - libsoup3 <no-dsa> (Minor issue)
[bookworm] - libsoup3 <no-dsa> (Minor issue)
[trixie] - libsoup2.4 <no-dsa> (Minor issue)
[bookworm] - libsoup2.4 <no-dsa> (Minor issue)
https://gitlab.gnome.org/GNOME/libsoup/-/issues/453