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CVE-2026-27807

MarkUs: YAML alias (‘billion laughs’) DoS in config upload PUBLISHED

Description (CNA)

MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.4, MarkUs allows course instructors to upload YAML files to create/update various entities (e.g., assignment settings). These YAML files are parsed with aliases enabled. This issue has been patched in version 2.9.4.

Affected (CNA)

Vendor / productVersions
MarkUsProject / Markusaffected < 2.9.4

CWE

CWE-776

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.