CVE-2026-55420
⚠️ highSummary
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.
CVSS Score
7.5
High
EPSS Score
0.4
Exploit Probability
Published Date
2026-07-09
First Seen: 2026-07-10
📊 Relative Risk Intelligence
This CVE is Moderate Risk - more severe than 67.8% of all 360,673 vulnerabilities in our database.
#116,318
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jul 14, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by
CISA
Last Modified
2026-07-14
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)