Is there a public exploit for CVE-2026-3633?

No public exploit for CVE-2026-3633 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-2026-3633?

CVE-2026-3633 scores CVSS 3.9 (v3.1), rated low. EPSS puts the chance of exploitation in the next 30 days at 0.23%.

3.9 Low

A flaw was found in libsoup.

CVE-2026-3633

A flaw was found in libsoup. A remote attacker, by controlling the method parameter of the soupmessagenew() function, could inject arbitrary headers and additional request data. This vulnerability, known as CRLF (Carriage Return Line Feed) injection, occurs because the method value is not properly escaped during request line construction, potentially leading to HTTP request injection.

Assessment

CVSS: 3.9 (v3.1)
Severity: Low
EPSS: 0.23% 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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