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CVE-2026-12549
medium
Description
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 resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding.
References
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516
https://bugzilla.redhat.com/show_bug.cgi?id=2489999