CVE-2026-77014

A flaw was found in libsoup's SoupServer HTTP Range header processing. The sort_ranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INT_MAX. This causes silent omission of requested byte ranges from HTTP 206 Partial Content responses on resources larger than approximately 2 GB.

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-27)

CWE

CWE-197

Published

2026-08-20

Modified

2026-10-27

Record from

the NVD, synced 2026-10-27

References

• https://access.redhat.com/security/cve/CVE-2026-77014
• https://bugzilla.redhat.com/show_bug.cgi?id=2520143
• https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550

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