node-diff — security advisory
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 at
- Products
- node-diff
- Affected versions
- 1.4.0~dfsg-1, 1.4.0~dfsg-2, 1.4.0~dfsg-3, 4.0.2~dfsg-2, 5.0.0~dfsg+~5.0.1-1, 5.0.0~dfsg+~5.0.1-2, 5.0.0~dfsg+~5.0.1-3, 5.0.0~dfsg+~5.0.1-4, 5.0.0~dfsg+~5.0.1-5, 5.0.0~dfsg+~5.0.1-6, 8.0.3~dfsg-4, 8.0.4~dfsg-1, 8.0.4~dfsg-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-24001
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:58 UTC · Revision 1
Source evidence
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 at
osv:UBUNTU-CVE-2026-24001
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
node-diff
Fixed versions: Not specified
Complete source record
{
"id": "00a0ab1511886df5737385503d854215a6e9a0f083bdf0bcc41c25798eceea30",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-24001",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-24001",
"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 `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 at",
"evidence": "osv:UBUNTU-CVE-2026-24001",
"products": [
{
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"evidence": "/affected/0/package/name"
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"severity": "high",
"structured": {
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"aliases": [
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"metrics": [
{
"type": "CVSS_V4",
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},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
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"events": [
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"database_specific": {
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],
"modified": "2026-10-17T12:59:56.204831784Z",
"provider": "osv",
"upstream": [
"CVE-2026-24001"
],
"references": [
"https://ubuntu.com/security/CVE-2026-24001",
"https://www.cve.org/CVERecord?id=CVE-2026-24001",
"https://github.com/kpdecker/jsdiff/security/advisories/GHSA-73rr-hh4g-fpgx",
"https://github.com/kpdecker/jsdiff/issues/653",
"https://github.com/kpdecker/jsdiff/pull/649",
"https://github.com/kpdecker/jsdiff/commit/15a1585230748c8ae6f8274c202e0c87309142f5"
]
},
"related_cves": [
{
"value": "CVE-2026-24001",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 359996,
"published_at": "2026-01-22T03:15:00+00:00"
}