Bug 2565907 (CVE-2026-121438)
| Summary: | CVE-2026-121438 mistune: mistune: Denial of Service via deeply nested Markdown brackets | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, sghai, sidsharm, suppawar, vlaad |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in mistune. A remote attacker could cause a Denial of Service (DoS) by submitting specially crafted Markdown input containing deeply nested brackets. Because the link parser performs repetitive scans when evaluating these nested brackets, processing the crafted input consumes excessive processor resources and can cause the parsing application to hang.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2567341, 2567342, 2567343 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-11-03 16:01:23 UTC
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