CVE-2026-3632

Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames

CVE-2026-3632 is fixed in 9 products on 1 platform, first by FEDORA-2026-6C3A4775A6, released November 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

3.9

Low

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0025

16th percentile

CVE-2026-3633 CVE-2026-3634 libsoup3: various flaws

Where it's fixed

Product	Fixed in	Fix	Released
Linux
libsoup3 · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
libsoup3-debuginfo · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
libsoup3-debugsource · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
libsoup3-devel · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
libsoup3-doc · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
mingw32-libsoup3 · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
mingw32-libsoup3-debuginfo · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
mingw64-libsoup3 · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026
mingw64-libsoup3-debuginfo · Fedora 43	3.6.6-6.fc43	FEDORA-2026-6C3A4775A6	Nov 13, 2026

Details

Published
March 21, 2026
Weakness
Improper Validation of Syntactic Correctness of Input
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3632

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-3632">CVE-2026-3632 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.