CVE-2026-75831

HIGHPre-NVD 7.67.6—
EchelonGraph scoreHIGH confidence

Score 7.6 from GitHub Security Advisory published 2026-08-18. a secondary CVSS source baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.6Exploit: Elevated riskExposed: 0

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

Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the audio and video media rendering through the sourceParsedownElement method. The media URL fragment is concatenated unescaped into rawHtml source elements, allowing attackers to inject arbitrary HTML and JavaScript that executes in viewers' sessions.

CVSS v3
7.6
EG Score
7.6(high)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity76% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 18, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

Grav before 2.0.15 Stored XSS via audio/video source URL | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-stored-xss-via-audio-video-source-url
github_commit Patch Available

commit aba291a59cab (getgrav/grav)

Patch available: getgrav/grav 2.0.0-rc.10 (contains commit aba291a59cab)

https://github.com/getgrav/grav/commit/aba291a59cab29ddce491175791888d8d0b65e20
github Patch Available🟡 PoC Available

Stored XSS via Markdown audio/video media <source> URL · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97

Vendor Advisories for CVE-2026-75831(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 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. 2026-08-20 22:59 UTCEG score recompute
  2. 2026-08-20 22:59 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 11:45 UTCGHSA enrichment
  5. 2026-08-20 00:30 UTCEG score recompute
  6. 2026-08-20 00:30 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 13:15 UTCGHSA enrichment
  9. 2026-08-19 02:01 UTCEG score recompute
  10. 2026-08-19 02:01 UTCGHSA enrichment
  11. 2026-08-18 14:47 UTCEG score recompute
  12. 2026-08-18 14:46 UTCGHSA enrichment
  13. 2026-08-18 14:08 UTCEG score recompute
  14. 2026-08-18 14:07 UTCGHSA enrichment
  15. 2026-08-18 12:35 UTCEG score recompute
  16. 2026-08-18 12:34 UTCGHSA enrichment
  17. 2026-08-18 11:29 UTCEG score recompute
  18. 2026-08-18 11:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-75831?
CVE-2026-75831 is a high vulnerability published on August 18, 2026. Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the audio and video media rendering through the sourceParsedownElement method. The media URL fragment is concatenated unescaped into rawHtml source elements, allowing attackers to inject arbitrary HTML and JavaScript that…
When was CVE-2026-75831 disclosed?
CVE-2026-75831 was first published in the National Vulnerability Database on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75831 actively exploited?
CVE-2026-75831 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 83.0% of all scored CVEs.
What is the CVSS score of CVE-2026-75831?
CVE-2026-75831 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-75831?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75831, 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

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