CVE-2026-12549

Name: CVE-2026-12549
Creator: NVD / NIST
Published: 2026-06-22T16:16:34.09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.32%

Last modified Jun 23, 2026

This CVE is reserved or awaiting analysis. Details will appear once published by NVD.

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.

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

0.32%

23.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-805

References

https://access.redhat.com/security/cve/CVE-2026-12549
https://access.redhat.com/security/cve/cve-2026-0716
https://bugzilla.redhat.com/show_bug.cgi?id=2489999
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516

Timeline

Published: Jun 22, 2026
Last Modified: Jun 23, 2026
Status: Awaiting Analysis

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Source: NVD / NIST