{"cve":"CVE-2026-24001","nvd":{"published":"2026-01-22T03:15:47.627","modified":"2026-07-15T02:18:46.763","status":"Modified","description":"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 `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`.","cvss_v4":{"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","score":2.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400","CWE-1333"],"references":["https://github.com/kpdecker/jsdiff/commit/15a1585230748c8ae6f8274c202e0c87309142f5","https://github.com/kpdecker/jsdiff/issues/653","https://github.com/kpdecker/jsdiff/pull/649","https://github.com/kpdecker/jsdiff/security/advisories/GHSA-73rr-hh4g-fpgx","https://access.redhat.com/security/cve/CVE-2026-24001"],"products":["kpdecker:jsdiff"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-24001","score":0.00616,"percentile":0.49546,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-73rr-hh4g-fpgx","url":"https://osv.dev/vulnerability/GHSA-73rr-hh4g-fpgx","summary":"jsdiff has a Denial of Service vulnerability in parsePatch and applyPatch","modified":"2026-09-10T03:50:32.703687207Z","packages":[{"ecosystem":"npm","name":"diff","purl":"pkg:npm/diff","ranges":[">=6.0.0 <8.0.3"],"fixed":["8.0.3"]},{"ecosystem":"npm","name":"diff","purl":"pkg:npm/diff","ranges":[">=5.0.0 <5.2.2"],"fixed":["5.2.2"]},{"ecosystem":"npm","name":"diff","purl":"pkg:npm/diff","ranges":[">=4.0.0 <4.0.4"],"fixed":["4.0.4"]},{"ecosystem":"npm","name":"diff","purl":"pkg:npm/diff","ranges":["<3.5.1"],"fixed":["3.5.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}