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CVE-2026-55420

Discourse: Remote code execution via pdf uploads PUBLISHED

Description (CNA)

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

Affected (CNA)

Vendor / productVersions
discourse / discourseaffected >= 2026.5.0-latest, < 2026.5.1; affected >= 2026.4.0-latest, < 2026.4.2; affected >= 2026.1.0-latest, < 2026.1.5

CWE

CWE-78

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.