CVE-2022-34749

unknown

Published 2022-07-26 · Modified 2023-11-08

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CVSS v3

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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`2.0.3-1`
debian	bullseye	affected
debian	forky	fixed	`2.0.3-1`
debian	sid	fixed	`2.0.3-1`
debian	trixie	fixed	`2.0.3-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	mistune	`>=2.0.0a1,<2.0.3`	`2.0.3`
PyPI	mistune	`<a6d43215132fe4f3d93f8d7e90ba83b16a0838b2\|\|>=2.0.0a1,<2.0.3`	`a6d43215132fe4f3d93f8d7e90ba83b16a0838b2`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.