Is there a public exploit for CVE-2026-120331?

No public exploit for CVE-2026-120331 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-2026-120331?

CVE-2026-120331 scores CVSS 5.3 (v4.0), rated medium.

What does CVE-2026-120331 affect?

CVE-2026-120331 affects TYPO3 Extension "Mail".

5.3 Medium

Content of external URL mails, their stylesheets and images to embed is fetched by the server without validating the target host.

CVE-2026-120331

Content of external URL mails, their stylesheets and images to embed is fetched by the server without validating the target host. Backend users with access to the mail module can make the server send requests to hosts in the internal network.

Assessment

CVSS: 5.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 3 November 2026
Last updated: 3 November 2026
Affected: TYPO3 · Extension "Mail"
Assigner: TYPO3

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

At the source

EUVD (ENISA)

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-037

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