CVE-2026-6324
Description
A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the `soup_body_input_stream_read_chunked()` function by sending a malicious HTTP request. This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a non-libsoup backend server. Successful exploitation can allow an attacker to bypass security controls, poison web caches, or gain unauthorized access.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2026-6324 NameCVE-2026-6324 DescriptionA flaw was found in libsoup. A remote attacker could exploit an unsign ... SourceCVE (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 Bugs1138213 Vulnerable and fixed packages The table below lists information on source packages. Source…
CVE-2026-6324
| Name | CVE-2026-6324 |
| Description | A flaw was found in libsoup. A remote attacker could exploit an unsign ... |
| 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 | 1138213 |
Vulnerable and fixed packages
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+deb11u3 | vulnerable | |
| bookworm | 2.74.3-1+deb12u1 | vulnerable | |
| trixie | 2.74.3-10.1 | vulnerable | |
| libsoup3 (PTS) | bookworm | 3.2.3-0+deb12u2 | vulnerable |
| trixie | 3.6.5-3 | vulnerable | |
| forky, sid | 3.6.6-1 | 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) | |||
| libsoup3 | source | (unstable) | (unfixed) | 1138213 |
Notes
https://gitlab.gnome.org/GNOME/libsoup/-/issues/508
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/517
https://gitlab.gnome.org/GNOME/libsoup/-/commit/96ac392b444d01bd5de1d1276b187c3ed49d048c (3.7.1)
Apply commands
https://gitlab.gnome.org/GNOME/libsoup/-/issues/508https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/517https://gitlab.gnome.org/GNOME/libsoup/-/commit/96ac392b444d01bd5de1d1276b187c3ed49d048c (3.7.1)OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | trixie | affected | |
| debian | forky | affected | |
| debian | sid | affected | |
References
- https://access.redhat.com/security/cve/CVE-2026-6324
- https://bugzilla.redhat.com/show_bug.cgi?id=2458479
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/508
- https://www.suse.com/security/cve/CVE-2026-6324.html
- https://gitlab.gnome.org/GNOME/libsoup/-/work_items/508
- https://security-tracker.debian.org/tracker/CVE-2026-6324
CWEs
CWE-444
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.