DEBIAN-CVE-2026-4867
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-4867
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4867.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-4867
- Upstream
- Published
- 2026-03-26T17:16:42.983Z
- Modified
- 2026-03-27T10:01:57.589025Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Impact: A bad regular expression is generated any time you have three or more parameters within a single segment, separated by something that is not a period (.). For example, /:a-:b-:c or /:a-:b-:c-:d. The backtrack protection added in path-to-regexp@0.1.12 only prevents ambiguity for two parameters. With three or more, the generated lookahead does not block single separator characters, so capture groups overlap and cause catastrophic backtracking. Patches: Upgrade to path-to-regexp@0.1.13 Custom regex patterns in route definitions (e.g., /:a-:b([^-/]+)-:c([^-/]+)) are not affected because they override the default capture group. Workarounds: All versions can be patched by providing a custom regular expression for parameters after the first in a single segment. As long as the custom regular expression does not match the text before the parameter, you will be safe. For example, change /:a-:b-:c to /:a-:b([^-/]+)-:c([^-/]+). If paths cannot be rewritten and versions cannot be upgraded, another alternative is to limit the URL length.
- References
Affected packages
Debian:11 / node-path-to-regexp
Package
- Name
- node-path-to-regexp
- Purl
- pkg:deb/debian/node-path-to-regexp?arch=source
Debian:12 / node-path-to-regexp
Package
- Name
- node-path-to-regexp
- Purl
- pkg:deb/debian/node-path-to-regexp?arch=source
Debian:13 / node-path-to-regexp
Package
- Name
- node-path-to-regexp
- Purl
- pkg:deb/debian/node-path-to-regexp?arch=source
Debian:14 / node-path-to-regexp
Package
- Name
- node-path-to-regexp
- Purl
- pkg:deb/debian/node-path-to-regexp?arch=source