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Vulnerability advisory

GHSA-r28v-mw67-m5p9

Django denial-of-service possibility in urlize and urlizetrunc template filters

Published Updated OSV record ↗

Also known as CVE-2018-7536PYSEC-2018-5

Severity
  • CVSS 3.xCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • CVSS 4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected versions

django PyPI

All django advisories →
AffectedFixed in
2.0a1 to before 2.0.32.0.3Advisories →
Also listed as affected (6)
1.11a1 to before 1.11.111.11.11Advisories →
Also listed as affected (14)
1.8a1 to before 1.8.191.8.19Advisories →
Also listed as affected (23)

Description

An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. The django.utils.html.urlize() function was extremely slow to evaluate certain inputs due to catastrophic backtracking vulnerabilities in two regular expressions (only one regular expression for Django 1.8.x). The urlize() function is used to implement the urlize and urlizetrunc template filters, which were thus vulnerable.

References

  • Codex
  • Claude Code
  • VS Code
  • GitHub Copilot
  • Cursor
  • Cline
  • Windsurf
  • Google Anti-gravity
  • OpenCode
  • Pi
  • Gemini CLI
  • Hermes Agent
  • Zed
  • Junie
  • Qwen Code
  • Kiro
  • Kilo Code
  • Factory Droid

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