DEBIAN-CVE-2026-12478

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Source
https://security-tracker.debian.org/tracker/CVE-2026-12478
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12478.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-12478
Upstream
  • CVE-2026-12478
Published
2026-07-14T10:16:30Z
Modified
2026-09-17T08:47:36Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L CVSS Calculator
Summary
[none]
Details

The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0.

References

Affected packages

Debian:14 / libsoup3

Package

Name
libsoup3
Purl
pkg:deb/debian/libsoup3?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.6.5-3
3.6.5-4
3.6.5-5
3.6.5-6
3.6.5-7
3.6.5-8
3.6.5-9
3.6.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12478.json"