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    CVE-2025-68475

    Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader. The HTML parsing regex at packages/fedify/src/runtime/docloader.ts:259 contains nested quantifiers that cause catastrophic backtracking when processing maliciously crafted HTML responses. This issue has been patched in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2.

    Published:Dec 22, 2025
    Last Modified:Mar 17, 2026
    EPS:Dec 22, 2025
    EPSS Score:0.00126
    CVSS Score:7.5

    Affected Products

    Vendor
    Fedify
    Product
    Fedify
    Vendor
    Fedify Project
    Product
    Fedify

    Exploits

    https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

    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