CVE-2022-34750

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    CVE-2022-34750

    Published: 28 Jun 2022Last Modified: 12 Aug 2026

    Summary:

    Details: 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.

    References: https://gerrit.wikimedia.org/r/q/I8171bfef73e525d73efa60b407ce147130ea4742, https://gerrit.wikimedia.org/r/q/Id89a9b08e40f075d2d422cafd03668dff3ce7fc9, https://phabricator.wikimedia.org/T308659, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/34xxx/CVE-2022-34750.json, https://nvd.nist.gov/vuln/detail/CVE-2022-34750

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.38.1
    1.38.0
    1.38.0-rc.1
    1.38.0-rc.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2022-34750 | CVE-DB