jsdiff has a Denial of Service vulnerability in parsePatch and applyPatch_CVE-2026-24001

{
    "lastseen": "",
    "description": "jsdiff is a JavaScript text differencing implementation. Prior to versions 8.0.3, 5.2.2, and 4.0.4, attempting to parse a patch whose filename headers contain the line break characters `\\r`, `\\u2028`, or `\\u2029` can cause the `parsePatch` method to enter an infinite loop. It then consumes memory without limit until the process crashes due to running out of memory. Applications are therefore likely to be vulnerable to a denial-of-service attack if they call `parsePatch` with a user-provided patch as input. A large payload is not needed to trigger the vulnerability, so size limits on user input do not provide any protection. Furthermore, some applications may be vulnerable even when calling `parsePatch` on a patch generated by the application itself if the user is nonetheless able to control the filename headers (e.g. by directly providing the filenames of the files to be diffed). The `applyPatch` method is similarly affected if (and only if) called with a string representation of a patch as an argument, since under the hood it parses that string using `parsePatch`. Other methods of the library are unaffected. Finally, a second and lesser interdependent bug - a ReDOS - also exhibits when those same line break characters are present in a patch's *patch* header (also known as its \"leading garbage\"). A maliciously-crafted patch header of length *n* can take `parsePatch` O(*n*\u00b3) time to parse. Versions 8.0.3, 5.2.2, and 4.0.4 contain a fix. As a workaround, do not attempt to parse patches that contain any of these characters: `\\r`, `\\u2028`, or `\\u2029`.",
    "published": "2026-01-22T02:23:44.059Z",
    "modified": "2026-01-22T12:58:09.928Z",
    "type": "cve",
    "title": "jsdiff has a Denial of Service vulnerability in parsePatch and applyPatch",
    "source": "GitHub_M",
    "references": "https://github.com/kpdecker/jsdiff/security/advisories/GHSA-73rr-hh4g-fpgx\nhttps://github.com/kpdecker/jsdiff/issues/653\nhttps://github.com/kpdecker/jsdiff/pull/649\nhttps://github.com/kpdecker/jsdiff/commit/15a1585230748c8ae6f8274c202e0c87309142f5",
    "id": "CVE-2026-24001",
    "bulletinFamily": "",
    "cwe": [
        "CWE-400",
        "CWE-1333"
    ],
    "cvelist": null,
    "sourceData": "kpdecker jsdiff >= 6.0.0, < 8.0.3\nkpdecker jsdiff >= 5.0.0, < 5.2.2\nkpdecker jsdiff < 4.0.4",
    "sourceHref": "",
    "cvss": {
        "score": 2.7,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "jsdiff",
    "version": ">= 6.0.0, < 8.0.3",
    "vendor": "kpdecker",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}