CVE-2026-86197

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 82% 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

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

Grav before 2.0.20 contains a cross-site scripting vulnerability in the Twig sandbox policy that allowlists addJs and addCss methods on Grav\Common\Assets without proper output escaping. Page editors can inject arbitrary script by registering malicious assets or injecting attributes, which are rendered unescaped into document head tags and executed for all visitors including administrators.

CVSS v3
5.1
EG Score
5.1(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 5, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Grav before 2.0.20 Cross-Site Scripting via Assets Sandbox | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-2.0.20-cross-site-scripting-via-assets-sandbox
github Patch Available🟡 PoC Available

Page editors can inject arbitrary script into rendered pages via the Twig sandbox's assets.addJs/addCss allowlist, escalating to super-admin · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-8hgv-xc77-jmcr

Vendor Advisories for CVE-2026-86197(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
getgrav/grav0.8.0 ... 2.0.9 (353 versions)2.0.20—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 40× 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. 2026-09-18 21:22 UTCEG score recompute
  2. 2026-09-18 21:22 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 20:22 UTCEG score recompute
  5. 2026-09-17 20:22 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-16 18:20 UTCEG score recompute
  8. 2026-09-16 18:20 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 17:15 UTCEG score recompute
  12. 2026-09-15 17:15 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 17:05 UTCGHSA enrichment
  16. 2026-09-13 16:55 UTCEG score recompute
  17. 2026-09-13 16:55 UTCGHSA enrichment
  18. 2026-09-12 16:45 UTCEG score recompute
  19. 2026-09-12 16:45 UTCGHSA enrichment
  20. 2026-09-11 16:35 UTCEG score recompute
  21. 2026-09-11 16:35 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-10 16:25 UTCEG score recompute
  25. 2026-09-10 16:25 UTCGHSA enrichment
Show 15 more
  1. 2026-09-10 15:27 UTCEG score recompute
  2. 2026-09-10 15:27 UTCGHSA enrichment
  3. 2026-09-09 23:20 UTCEG score recompute
  4. 2026-09-09 23:20 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-08 20:13 UTCGHSA enrichment
  7. 2026-09-08 16:16 UTCEG score recompute
  8. 2026-09-08 16:16 UTCGHSA enrichment
  9. 2026-09-07 14:12 UTCEG score recompute
  10. 2026-09-07 14:12 UTCGHSA enrichment
  11. 2026-09-06 13:48 UTCEPSS rescore
  12. 2026-09-06 13:32 UTCGHSA enrichment
  13. 2026-09-05 13:22 UTCEG score recompute
  14. 2026-09-05 12:34 UTCEG score recompute
  15. 2026-09-05 12:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86197?
CVE-2026-86197 is a medium vulnerability published on September 5, 2026. Grav before 2.0.20 contains a cross-site scripting vulnerability in the Twig sandbox policy that allowlists addJs and addCss methods on Grav\Common\Assets without proper output escaping. Page editors can inject arbitrary script by registering malicious assets or injecting attributes, which are…
When was CVE-2026-86197 disclosed?
CVE-2026-86197 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86197 actively exploited?
CVE-2026-86197 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 82.3% of all scored CVEs.
What is the CVSS score of CVE-2026-86197?
CVE-2026-86197 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-86197?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86197, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-86197

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