What is CVE-2026-3633?

CVE-2026-3633 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-2026-3633?

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

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-3633

A flaw was found in libsoup. A remote attacker, by controlling the method parameter of the `soup_message_new()` function, could inject arbitrary headers and additional request data. This vulnerability, known as CRLF (Carriage Return Line F…

Vulnerability class: CRLF Injection

EPSS: 0.000 (15.4th 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-2026-3633 (vdb-entry, x_refsource_REDHAT)
RHBZ#2445128 (issue-tracking, x_refsource_REDHAT)
gitlab.gnome.org/GNOME/libsoup/-/issues/484

Frequently asked questions

What is CVE-2026-3633?: CVE-2026-3633 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-2026-3633?: Low severity. CVSS v3 base score is 3.9 out of 10.