CVE-2026-53962

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
18.8%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Insufficient SVG sanitization logic · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vv
github_commit

commit b8ceb49f4ba5 (discourse/discourse)

Fix landed in discourse/discourse commit b8ceb49f4ba5 — awaiting tagged release

https://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf03be5fe
github_commit

commit 92a699d89b84 (discourse/discourse)

Fix landed in discourse/discourse commit 92a699d89b84 — awaiting tagged release

https://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793c69dad
github_commit

commit 810c2715799f (discourse/discourse)

Fix landed in discourse/discourse commit 810c2715799f — awaiting tagged release

https://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fe9ea6ff
github_commit

commit 3ee8343cd7f0 (discourse/discourse)

Fix landed in discourse/discourse commit 3ee8343cd7f0 — awaiting tagged release

https://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50bfc358

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 08:37 UTCEG score recompute
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-14 10:51 UTCEG score recompute
  7. 2026-07-13 22:31 UTCEPSS rescore
  8. 2026-07-13 13:07 UTCEG score recompute
  9. 2026-07-13 06:13 UTCEPSS rescore
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-12 15:24 UTCEG score recompute
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 17:38 UTCEG score recompute
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-10 19:54 UTCEG score recompute
  17. 2026-07-09 22:11 UTCEG score recompute
  18. 2026-07-09 22:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-53962?
CVE-2026-53962 is a medium vulnerability published on July 9, 2026. Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is…
When was CVE-2026-53962 disclosed?
CVE-2026-53962 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53962 actively exploited?
CVE-2026-53962 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53962?
CVE-2026-53962 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-53962?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53962, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-53962

Explore →

Is Your Infrastructure Affected by CVE-2026-53962?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs