{"id":"CVE-2026-24001","title":"jsdiff is a JavaScript text differencing implementation","summary":"jsdiff is a JavaScript text differencing implementation. Prior to versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1, attempting to parse a patch whose filename headers contain the line break characters `\\r`, `\\u2028`, or `\\u2029` can cause the `pa…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-1333","CWE-400"],"vendor":"kpdecker","product":"jsdiff","affected":["jsdiff < 3.5.1","jsdiff >= 4.0.0, < 4.0.4","jsdiff >= 5.0.0, < 5.2.2","jsdiff >= 6.0.0, < 8.0.3"],"patched":["jsdiff 8.0.3"],"published":"2026-01-22","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-24001","references":[{"url":"https://github.com/kpdecker/jsdiff/commit/15a1585230748c8ae6f8274c202e0c87309142f5","label":"security-advisories@github.com"},{"url":"https://github.com/kpdecker/jsdiff/issues/653","label":"security-advisories@github.com"},{"url":"https://github.com/kpdecker/jsdiff/pull/649","label":"security-advisories@github.com"},{"url":"https://github.com/kpdecker/jsdiff/security/advisories/GHSA-73rr-hh4g-fpgx","label":"security-advisories@github.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-24001","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2431930","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24001.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00625,"epssPercentile":0.48309,"ingestedAt":"2026-06-30T13:26:50.538Z","slug":"CVE-2026-24001","body":"## Overview\n\njsdiff is a JavaScript text differencing implementation. Prior to versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1, 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*³) time to parse. Versions 8.0.3, 5.2.2, 4.0.4, and 3.5.1 contain a fix. As a workaround, do not attempt to parse patches that contain any of these characters: `\\r`, `\\u2028`, or `\\u2029`.\n\n## Affected\n\n- `jsdiff < 3.5.1`\n- `jsdiff >= 4.0.0, < 4.0.4`\n- `jsdiff >= 5.0.0, < 5.2.2`\n- `jsdiff >= 6.0.0, < 8.0.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `jsdiff 8.0.3`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}