Bug 2436317

Summary: CVE-2026-1801 libsoup3: libsoup: HTTP Request Smuggling via malformed chunk headers [fedora-all]
Product: [Fedora] Fedora Reporter: Abhishek Raj <abhraj>
Component: libsoup3Assignee: Gwyn Ciesla <gwync>
Status: CLOSED CURRENTRELEASE QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: 43CC: gnome-sig, gwync, mcrha
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["5daba5ec-1754-41e1-a7f4-9a514ca67373"]}
Fixed In Version: libsoup3-3.6.6-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-03-19 13:35:11 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2436315    

Description Abhishek Raj 2026-02-03 12:49:36 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Comment 1 Milan Crha 2026-03-19 13:35:11 UTC 
It seems this is split into multiple fixes. One landed for 3.6.6 at least according to https://gitlab.gnome.org/GNOME/libsoup/-/issues/481

That issue mentions also one more commit, but I guess it's referenced only because it's (partly) related to the problem described in the 481.