Is there a public exploit for CVE-2026-3634?

No public exploit for CVE-2026-3634 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-3634?

CVE-2026-3634 scores CVSS 3.9 (v3.1), rated low. EPSS puts the chance of exploitation in the next 30 days at 0.19%.

3.9 Low

A flaw was found in libsoup.

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 soupmessageheaderssetcontenttype() function. This vulnerability allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks.

Assessment

CVSS: 3.9 (v3.1)
Severity: Low
EPSS: 0.19% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 17 March 2026
Last updated: 3 November 2026
Assigner: redhat

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

At the source

EUVD (ENISA)

References

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