CVE-2022-34750

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An issue was discovered in MediaWiki through 1.38.1. The lemma length of a Wikibase lexeme is currently capped at a thousand characters. Unfortunately, this length is not validated, allowing much larger lexemes to be created, which introduces various denial-of-service attack vectors within the Wikibase and WikibaseLexeme extensions. This is related to Special:NewLexeme and Special:NewProperty.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

No affected versions have been published.

Timeline

Published
Jun 28, 2022
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2022-34750: High severity, CVSS 7.5 | Vulnix