CVE-2026-4671
CVE-2026-4671 · justhtml before 1.18.0 Denial of Service via CSS Selector
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justhtml before 1.18.0 contains multiple low-severity denial-of-service issues in CSS selector handling and linkification. Applications that evaluate attacker-controlled selector strings (via query(), matches(), or selector-based transforms), run selector matching over very large untrusted documents, construct DOM trees from untrusted structure, or enable linkification over attacker-controlled text may consume disproportionate CPU or memory. Triggers include oversized selectors, large selector lists, oversized compound selectors, long combinator chains, deeply nested functional pseudo-classes, repeated token/positional matching, cyclic DOM graphs causing non-terminating traversal, and punctuation-heavy or trailing-bracket linkification input. These are availability-only concerns and do not by themselves allow script execution, data disclosure, or sanitizer bypass. Default JustHTML(sanitize=True) usage is not expected to be exposed, since selectors are normally supplied by application code.
CVSS 8.7 · Hoch · EPSS 0,7% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: python
Betroffene Produkte und Versionen
justhtml
- Softwareversionen
- ≥ 0, < 1.18.0: Betroffen (semver)
- 1.18.0: Nicht betroffen (semver)
Auf 1.18.0 aktualisieren
justhtml PyPI
- Softwareversionen
- 0.1.0
- 0.10.0
- 0.11.0
- 0.12.0
- 0.13.0
- 0.13.1
- 0.14.0
- 0.15.0
- 0.16.0
- 0.17.0
- 0.18.0
- 0.19.0
- 0.2.0
- 0.20.0
- 0.21.0
- 0.22.0
- 0.23.0
- 0.24.0
- 0.25.0
- 0.26.0
- 0.27.0
- 0.28.0
- 0.29.0
- 0.3.0
- 0.30.0
- 0.31.0
- 0.32.0
- 0.33.0
- 0.34.0
- 0.35.0
- 0.36.0
- 0.37.0
- 0.38.0
- 0.39.0
- 0.4.0
- 0.40.0
- 0.5.0
- 0.5.1
- 0.5.2
- 0.6.0
- 0.7.0
- 0.8.0
- 0.9.0
- 1.0.0
- 1.1.0
- 1.10.0
- 1.11.0
- 1.12.0
- 1.13.0
- 1.14.0
- 1.15.0
- 1.16.0
- 1.17.0
- 1.2.0
- 1.3.0
- 1.4.0
- 1.5.0
- 1.6.0
- 1.7.0
- 1.8.0
- 1.9.0
- 1.9.1
- Betroffene Versionsbereiche
- ECOSYSTEM: < 1.18.0
Auf 1.18.0 aktualisieren