DEBIAN-CVE-2026-55520
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-55520
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55520.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-55520
- Upstream
- Published
- 2026-08-28T20:18:28Z
- Modified
- 2026-09-10T08:47:30Z
- Severity
-
- 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
Protego is a pure-Python robots.txt parser with support for modern conventions. Prior to 0.6.2, protego._urlpattern._URLPattern._prepare_pattern_for_regex translates every asterisk in an Allow or Disallow directive into a lazy regular-expression wildcard, so a directive containing many asterisks creates exponential backtracking. After protego.Protego.parse processes a crafted robots.txt file, protego.Protego.can_fetch can spend an attacker-controlled period matching a near-miss URL and deny service to the crawler. The vulnerable path is src/protego/_urlpattern.py in the _URLPattern match logic. This issue is fixed in version 0.6.2.
- References
Affected packages
Debian:12 / python-protego
Package
- Name
- python-protego
- Purl
- pkg:deb/debian/python-protego?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / python-protego
Package
- Name
- python-protego
- Purl
- pkg:deb/debian/python-protego?arch=source&distro=trixie
Debian:14 / python-protego
Package
- Name
- python-protego
- Purl
- pkg:deb/debian/python-protego?arch=source&distro=forky