What is CVE-2026-3634?

CVE-2026-3634 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under CRLF Injection. CVSS score: 3.9/10. Published 2026-03-17.

How severe is CVE-2026-3634?

Low severity. CVSS v3 base score is 3.9 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-3634

A flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()` f…

Vulnerability class: CRLF Injection

EPSS: 0.000 (11.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

access.redhat.com/security/cve/CVE-2026-3634 (vdb-entry, x_refsource_REDHAT)
RHBZ#2445129 (issue-tracking, x_refsource_REDHAT)
gitlab.gnome.org/GNOME/libsoup/-/issues/485

Frequently asked questions

What is CVE-2026-3634?: CVE-2026-3634 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under CRLF Injection. CVSS score: 3.9/10. Published 2026-03-17.
How severe is CVE-2026-3634?: Low severity. CVSS v3 base score is 3.9 out of 10.