CVE catalog

CVE-2025-9901

libsoup2.4: CVE-2025-9901

Severity: Medium · CVSS 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: Sep 3, 2025, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.45% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libsoup3	sid	`3.8.0-3`	vulnerable
Debian	libsoup3	forky	`3.8.0-3`	vulnerable
Debian	libsoup3	trixie	`3.6.5-3`	vulnerable
Debian	libsoup3	bookworm	`3.2.3-0+deb12u2`	vulnerable
Debian	libsoup2.4	trixie	`2.74.3-10.1`	vulnerable
Debian	libsoup2.4	bookworm	`2.74.3-1+deb12u1`	vulnerable
Ubuntu	libsoup2.4	pro	`2.74.3-10.1ubuntu4`	vulnerable
Ubuntu	libsoup2.4	pro	`2.74.3-10.1ubuntu5`	vulnerable
Ubuntu	libsoup2.4	pro	`2.74.3-10.1ubuntu5+esm1`	vulnerable
Ubuntu	libsoup2.4	pro	`2.74.3-10.1ubuntu5+esm2`	vulnerable
Ubuntu	libsoup2.4	pro	`2.74.3-10.1ubuntu5+esm3`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.72.0-3ubuntu3`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.1-1`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-2`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.1`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.2`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.3`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.4`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.5`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.6`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.7`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.8`	vulnerable
Ubuntu	libsoup2.4	22.04	`2.74.2-3ubuntu0.9`	vulnerable
Ubuntu	libsoup3	pro	`3.0.4-2`	vulnerable
Ubuntu	libsoup3	pro	`3.0.4-3`	vulnerable
Ubuntu	libsoup3	pro	`3.0.5-1`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm1`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm2`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm3`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm4`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm5`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm6`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm7`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm8`	vulnerable
Ubuntu	libsoup3	pro	`3.0.7-0ubuntu1+esm9`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-1`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-2`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-3`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6build1`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.1`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.2`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.3`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.4`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.5`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.6`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.7`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.8`	vulnerable
Ubuntu	libsoup2.4	24.04	`2.74.3-6ubuntu1.9`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.2-4`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-1`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-2`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-4`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5build1`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5build2`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.1`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.2`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.3`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.4`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.5`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.6`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.7`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.8`	vulnerable
Ubuntu	libsoup3	24.04	`3.4.4-5ubuntu0.9`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10.1`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10.1ubuntu1`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10.1ubuntu2`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10.1ubuntu3`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10.1ubuntu4`	vulnerable
Ubuntu	libsoup2.4	25.10	`2.74.3-10.1ubuntu4.1`	vulnerable
Ubuntu	libsoup3	25.10	`3.6.5-1`	vulnerable
Ubuntu	libsoup3	25.10	`3.6.5-1ubuntu1`	vulnerable
Ubuntu	libsoup3	25.10	`3.6.5-3`	vulnerable
Ubuntu	libsoup3	25.10	`3.6.5-4`	vulnerable
Ubuntu	libsoup3	25.10	`3.6.5-4ubuntu0.1`	vulnerable
Ubuntu	libsoup3	25.10	`3.6.5-4ubuntu0.2`	vulnerable
Ubuntu	libsoup2.4	26.10	`2.74.3-10.1ubuntu5`	vulnerable
Ubuntu	libsoup3	26.10	`3.6.6-1`	vulnerable
Ubuntu	libsoup3	26.10	`3.6.6-1ubuntu3`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-4`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-5`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-6`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-7`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.5-9`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.6-1`	vulnerable
Ubuntu	libsoup3	26.04	`3.6.6-1ubuntu0.1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libsoup3	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libsoup3	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libsoup3	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libsoup3	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	libsoup2.4	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1113992]
Debian	libsoup2.4	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1113992]

[Debian bug #1113992]

Notes

[trixie] libsoup3: Minor issue [bookworm] libsoup3: Minor issue [trixie] libsoup2.4: Minor issue [bookworm] libsoup2.4: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[gir1.2-soup-2.4]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[gir1.2-soup-3.0]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
[libsoup2.4-1]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[libsoup2.4-common]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[libsoup2.4-dev]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[libsoup2.4-doc]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[libsoup2.4-tests]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[libsoup-3.0-0]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
[libsoup-3.0-common]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
[libsoup-3.0-dev]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
[libsoup-3.0-doc]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
[libsoup-3.0-tests]Affected
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  dsa · libsoup3 · debian · bookworm; dsa · libsoup3 · debian · 12
[libsoup-gnome2.4-1]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
[libsoup-gnome2.4-dev]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  dsa · libsoup2.4 · debian · bookworm; dsa · libsoup2.4 · debian · 12

[Debian 13 (Trixie)]

[gir1.2-soup-2.4]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · amd64 · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
- 2.74.3-10.1 · arm64 · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
[gir1.2-soup-3.0]Affected
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · amd64 · trixie
  Affected
  dsa · libsoup3 · debian · 13
- 3.6.5-3 · arm64 · trixie
  Affected
  dsa · libsoup3 · debian · 13
[libsoup-2.4-1]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · amd64 · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
- 2.74.3-10.1 · arm64 · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
[libsoup2.4-common]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · all · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
- 2.74.3-10.1 · all · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
[libsoup2.4-dev]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · amd64 · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
- 2.74.3-10.1 · arm64 · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
[libsoup2.4-doc]Affected
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · all · trixie
  Affected
  dsa · libsoup2.4 · debian · 13
- 2.74.3-10.1 · all · trixie
  Affected
  dsa · libsoup2.4 · debian · 13

Next results

Observed: Oct 24, 2026, 7:21:20 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]