CVE-2026-52762

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    CVE-2026-52762

    Published: 4 Sept 2026Last Modified: 10 Sept 2026

    Summary: YesWiki: Authenticated (Admin) Server-Side Template Injection to Remote Code Execution via Bazar Semantic Templates

    Details: YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki Bazar contains a stored Server-Side Template Injection (SSTI) vulnerability in the semantic template feature that can be escalated to confirmed Remote Code Execution (RCE). An authenticated administrator can place arbitrary Twig expressions into the Semantic template (Twig) field (bn_sem_template), and that content is later executed server-side when public semantic endpoints are requested. This issue has been patched in version 4.6.6.

    References: https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52762.json, https://github.com/YesWiki/yeswiki/security/advisories/GHSA-65p8-9433-jpcp, https://nvd.nist.gov/vuln/detail/CVE-2026-52762, https://github.com/YesWiki/yeswiki/commit/89462f1577a8a1fe7fcff75e77b5058a74d8047b

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -89462f1577a8a1fe7fcff75e77b5058a74d8047b

    Affected versions

    v4.6.5
    v4.6.4
    v4.6.3
    v4.6.2
    v4.6.0

    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-2026-52762 | CVE-DB