CVE-2026-55424

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 34.3% of scored records. A rank, not a probability.

NVD base score

7.4 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-07-14.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-09 22:01Z1 MO AGO

Last updated

2026-07-10 14:40Z1 MO AGO

Reserved

2026-06-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.4)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.2

Document digest

385dc9f2da3c81c0e42a92e8439c0d69b224614995c66c400fcd0d00e83d09ef

• github.comhttps://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3x_refsource_CONFIRM
• github.comhttps://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242cx_refsource_MISC
• github.comhttps://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/releases/tag/v2026.1.5x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/releases/tag/v2026.4.2x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/releases/tag/v2026.5.1x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/releases/tag/v2026.6.0x_refsource_MISC