Vulnerability in Gnome Libsoup
CVE-2026-12549
The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulti…
EPSS: 0.004 (33.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, Mitigation, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, technical-description, Mitigation, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (Exploit, Patch, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-12549?
- CVE-2026-12549 is a medium-severity vulnerability in Gnome Libsoup, classified under Buffer Access with Incorrect Length Value. CVSS score: 4.8/10. Published 2026-06-22.
- How severe is CVE-2026-12549?
- Medium severity. CVSS v3 base score is 4.8 out of 10.