CVE-2026-53962

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 ImpactpartialSuccessful exploitation gives limited 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

Equal to or higher than the score of 35.4% of scored records. A rank, not a probability.

NVD base score

5.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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 22:02Z3 MO AGO

Last updated

2026-07-10 20:31Z3 MO AGO

Reserved

2026-06-11

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.4)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weaknesses

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

Data version

5.2

Document digest

7b3a6f261aa9fc2c972d44a67ffb6ee5792dbeb7ce4e22c7cc22a1113127e0f6

• github.comhttps://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vvx_refsource_CONFIRM
• github.comhttps://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50bfc358x_refsource_MISC
• github.comhttps://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fe9ea6ffx_refsource_MISC
• github.comhttps://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793c69dadx_refsource_MISC
• github.comhttps://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf03be5fex_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