CVE-2026-74793

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-08-23. a secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: Elevated riskExposed: 0

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

justhtml before 3.11.0 contains a cross-site scripting vulnerability where the default sanitizer bypasses event handler removal in selectedcontent projections. Attackers can inject SVG or MathML elements with event handlers that are cloned and reinserted into output without sanitization, enabling stored or reflected XSS attacks.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 23, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 23, 2026
Patch available. Sources: github.
generic

justhtml before 3.11.0 XSS via selectedcontent projection | Advisories | VulnCheck

https://www.vulncheck.com/advisories/justhtml-before-xss-via-selectedcontent-projection
github Patch Available

Default sanitizer bypass: <selectedcontent> projection re-inserts unsanitized subtree (plus two availability findings) · Advisory · EmilStenstrom/justhtml · GitHub

Affected: 1.14.0, so this looks distinct. There is no

https://github.com/EmilStenstrom/justhtml/security/advisories/GHSA-gjf2-f4jc-69xf

Vendor Advisories for CVE-2026-74793(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 25× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 13:41 UTCEG score recompute
  3. 2026-08-29 13:41 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 14:55 UTCGHSA enrichment
  6. 2026-08-27 16:09 UTCEG score recompute
  7. 2026-08-27 16:09 UTCGHSA enrichment
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 17:24 UTCGHSA enrichment
  10. 2026-08-26 16:13 UTCEG score recompute
  11. 2026-08-26 16:13 UTCGHSA enrichment
  12. 2026-08-26 14:47 UTCEPSS rescore
  13. 2026-08-25 17:09 UTCEG score recompute
  14. 2026-08-25 17:09 UTCGHSA enrichment
  15. 2026-08-25 13:49 UTCEPSS rescore
  16. 2026-08-24 18:24 UTCEG score recompute
  17. 2026-08-24 18:24 UTCGHSA enrichment
  18. 2026-08-24 18:16 UTCEG score recompute
  19. 2026-08-24 18:16 UTCGHSA enrichment
  20. 2026-08-24 14:18 UTCEPSS rescore
  21. 2026-08-24 13:05 UTCEG score recompute
  22. 2026-08-24 13:05 UTCGHSA enrichment
  23. 2026-08-23 14:20 UTCEG score recompute
  24. 2026-08-23 13:51 UTCEG score recompute
  25. 2026-08-23 13:50 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74793?
CVE-2026-74793 is a medium vulnerability published on August 23, 2026. justhtml before 3.11.0 contains a cross-site scripting vulnerability where the default sanitizer bypasses event handler removal in selectedcontent projections. Attackers can inject SVG or MathML elements with event handlers that are cloned and reinserted into output without sanitization, enabling…
When was CVE-2026-74793 disclosed?
CVE-2026-74793 was first published in the National Vulnerability Database on August 23, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74793 actively exploited?
CVE-2026-74793 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 89.6% of all scored CVEs.
What is the CVSS score of CVE-2026-74793?
CVE-2026-74793 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-74793?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74793, 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-2026-74793

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