mediumCVSS 6.1Vulnerability
CVE-2026-77606
#### Failure mode When `headers=plain`, table header text was emitted into `<th>` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML. #### Remediation - `TableResultPrinter` now applies output-context escaping before passing plain headers to the table renderer. - The fix is limited to the HTML/plain-header branch so safe rendering modes are unaffected. #### Why this is the right layer The header value is not a structural token; it is display data. Sanitizing it at the sink is correct because the renderer owns the final HTML emission.
Properties
- ghsa_id
- GHSA-3jp5-3h47-28qf
- severity
- medium
- summary
- Semantic MediaWiki has reflected XSS in Special:Ask plain table headers
- cvss_score
- 6.1
- cve_id
- CVE-2026-77606
- cvss_vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- signal_observed_at
- 2026-09-18T17:46:44+00:00
- is_ghsa_only
- false
- ghsa_published
- 2026-09-18T16:40:36Z
- source_url
- https://github.com/advisories/GHSA-3jp5-3h47-28qf
- ghsa_updated
- 2026-09-18T16:40:37Z
Related Entities (4)
VULNERABLE_TO (1)
←[Software]composer/mediawiki/semantic-media-wiki
AFFECTS (1)
→[Software]composer/mediawiki/semantic-media-wiki
HAS_WEAKNESS (1)
→[Weakness]Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
REPORTED_BY (1)
→[Source]GitHub Advisory Database
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