Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-59929

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src/mistune/renderers/html.py blocks only javascript:, vbscript:, file:, and data: schemes, allowing legacy or chained schemes such as feed:, view-source:, jar:, livescript:, mocha:, ms-its:, mk:, and res: to reach rendered href and src attributes and potentially execute script in affected user agents. This issue is fixed in version 3.3.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b4a6ff84d1ca19e8a38689ae964b64b04c38b74307147cbb6f1af224d9bebf84
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-184","description":"CWE-184: Incomplete List of Disallowed Inputs","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"mistune","vendor":"lepture","versions":[{"status":"affected","version":"< 3.3.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-184","description":"CWE-184: Incomplete List of Disallowed Inputs","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc","tags":["x_refsource_MISC"],"url":"https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/references/1
{"name":"https://github.com/lepture/mistune/releases/tag/v3.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/lepture/mistune/releases/tag/v3.3.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/references/2
{"name":"https://github.com/lepture/mistune/security/advisories/GHSA-qfrw-5rxm-mhh2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/lepture/mistune/security/advisories/GHSA-qfrw-5rxm-mhh2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4ef34de5737c89ea6fad61eec558a19a660dcf5ee1cad4abd2db5802a2da4073 · sha256:9cede1bd1258e0bc… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer