CVE-2026-75828

HIGHPre-NVD 8.78.7—
EchelonGraph scoreHIGH confidence

Score 8.7 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. a secondary CVSS source baseline 8.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: 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 detectXss() function where unpaired quotes in unquoted attribute values bypass event-handler detection. Authenticated editors can inject event handlers like onerror= that pass validation and execute in visitor browsers when page content is rendered.

CVSS v3
8.7
EG Score
8.7(high)
EG Risk
55(Track*)
EG Risk 55/100SSVC: 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
Severity87% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
Patch available. Sources: github.
generic

Grav before 2.0.15 Stored XSS via detectXss() Quote Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-stored-xss-via-detectxss-quote-bypass
github Patch Available

detectXss() misses an event-handler attribute after an unpaired quote in an unquoted attribute value, giving stored XSS · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-vfmf-q6x9-cw96

Vendor Advisories for CVE-2026-75828(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 16× in last 7d / 16× 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 22:56 UTCEPSS rescore
  2. 2026-08-20 20:21 UTCGHSA enrichment
  3. 2026-08-20 07:18 UTCGHSA enrichment
  4. 2026-08-19 18:16 UTCEG score recompute
  5. 2026-08-19 18:16 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 03:49 UTCEG score recompute
  8. 2026-08-19 03:49 UTCGHSA enrichment
  9. 2026-08-18 14:47 UTCEG score recompute
  10. 2026-08-18 14:46 UTCGHSA enrichment
  11. 2026-08-18 14:08 UTCEG score recompute
  12. 2026-08-18 14:07 UTCGHSA enrichment
  13. 2026-08-18 12:35 UTCEG score recompute
  14. 2026-08-18 12:34 UTCGHSA enrichment
  15. 2026-08-18 11:29 UTCEG score recompute
  16. 2026-08-18 11:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-75828?
CVE-2026-75828 is a high vulnerability published on August 18, 2026. Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the detectXss() function where unpaired quotes in unquoted attribute values bypass event-handler detection. Authenticated editors can inject event handlers like onerror= that pass validation and execute in visitor browsers…
When was CVE-2026-75828 disclosed?
CVE-2026-75828 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-2026-75828 actively exploited?
CVE-2026-75828 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 80.6% of all scored CVEs.
What is the CVSS score of CVE-2026-75828?
CVE-2026-75828 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-75828?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75828, 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-2026-75828

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