CVE-2026-77014CWE-197

CVE-2026-77014

Medium · published August 20, 2026

CVSS v3.1

5.3

EPSS

Percentile

14.0

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 5.3 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00232 · 14.0th percentile
Weakness: CWE-197 · Numeric Truncation Error
Published: 2026-08-20T13:16Z

References (3)

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

EPSS history

Timeline

20 AUG 08:21Z
Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of http range responses
cvelistv5