Is there a public exploit for CVE-2026-126563?

No public exploit for CVE-2026-126563 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-2026-126563?

CVE-2026-126563 scores CVSS 5.3 (v4.0), rated medium.

What does CVE-2026-126563 affect?

CVE-2026-126563 affects SemanticMediaWiki SemanticMediaWiki.

5.3 Medium

Semantic MediaWiki 2.4.0 before 7.4.1 contains a reflected cross-site scripting vulnerability in…

CVE-2026-126563

Semantic MediaWiki 2.4.0 before 7.4.1 contains a reflected cross-site scripting vulnerability in TimeValueFormatter::getCaptionFromFreeFormat(), which emits free-format date captions in HTML without escaping. Unauthenticated attackers can craft a Special:Ask URL with HTML markup in a date printout format (#-F[...]) to execute script in a logged-in victim's browser session.

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: 11 November 2026
Last updated: 11 November 2026
Affected: SemanticMediaWiki · SemanticMediaWiki
Assigner: VulnCheck

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

At the source

EUVD (ENISA)

References

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