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CVE-2026-44708

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the mistune math plugin renders inline math ($...$) and block math ($$...$$) by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all user-controlled text is sanitised before reaching the DOM. This vulnerability is fixed in 3.2.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:240034beef066cede6dc45758a3f178f7695a9c562d697ba26fdb574fa1df8c5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"mistune","vendor":"lepture","versions":[{"status":"affected","version":"< 3.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef16c96e0ad2add9841bb8d4ffed17f5e4dfb2e655210cbfb4816cb5e872e7ec · sha256:23d37792b0df9afd… · /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:ef16c96e0ad2add9841bb8d4ffed17f5e4dfb2e655210cbfb4816cb5e872e7ec · sha256:23d37792b0df9afd… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"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:ef16c96e0ad2add9841bb8d4ffed17f5e4dfb2e655210cbfb4816cb5e872e7ec · sha256:23d37792b0df9afd… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/lepture/mistune/releases/tag/v3.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/lepture/mistune/releases/tag/v3.2.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef16c96e0ad2add9841bb8d4ffed17f5e4dfb2e655210cbfb4816cb5e872e7ec · sha256:23d37792b0df9afd… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef16c96e0ad2add9841bb8d4ffed17f5e4dfb2e655210cbfb4816cb5e872e7ec · sha256:23d37792b0df9afd… · /containers/adp/0/references/0
{"name":"https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef16c96e0ad2add9841bb8d4ffed17f5e4dfb2e655210cbfb4816cb5e872e7ec · sha256:23d37792b0df9afd… · /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.

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