CVE-2026-79988

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% 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 — 4 sources updated this week
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: None knownExposed: 0

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

The Twig sandbox mechanism in Craft CMS is configured to allow dangerous functionality from the Yii framework, leading to authenticated RCE similar to previously disclosed vulnerabilities.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (3)

Auto-updated Aug 27, 2026
Patch available. Sources: github_release.
generic

GitHub - craftcms/cms: Build bespoke content experiences with Craft. · GitHub

https://github.com/craftcms/cms
github_release Patch Available

5.10.7

Patch available: craftcms/cms 5.10.7

https://github.com/craftcms/cms/releases/tag/5.10.7
generic

Authenticated RCE through Twig sandbox escape | Hackrate

https://www.hckrt.com/hacktivity/HCKRT-8RQQ7K

Vendor Advisories for CVE-2026-79988(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 21× in last 7d / 21× 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 20:00 UTCGHSA enrichment
  3. 2026-08-29 08:22 UTCEG score recompute
  4. 2026-08-29 08:22 UTCGHSA enrichment
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-28 20:43 UTCEG score recompute
  7. 2026-08-28 20:43 UTCGHSA enrichment
  8. 2026-08-28 19:47 UTCEG score recompute
  9. 2026-08-28 19:47 UTCGHSA enrichment
  10. 2026-08-28 16:13 UTCGHSA enrichment
  11. 2026-08-28 05:26 UTCEG score recompute
  12. 2026-08-28 05:26 UTCGHSA enrichment
  13. 2026-08-28 04:59 UTCEG score recompute
  14. 2026-08-28 04:59 UTCGHSA enrichment
  15. 2026-08-27 20:27 UTCEG score recompute
  16. 2026-08-27 20:27 UTCGHSA enrichment
  17. 2026-08-27 20:17 UTCEG score recompute
  18. 2026-08-27 20:17 UTCGHSA enrichment
  19. 2026-08-27 17:24 UTCEG score recompute
  20. 2026-08-27 16:47 UTCEG score recompute
  21. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-79988?
CVE-2026-79988 is a high vulnerability published on August 27, 2026. The Twig sandbox mechanism in Craft CMS is configured to allow dangerous functionality from the Yii framework, leading to authenticated RCE similar to previously disclosed vulnerabilities.
When was CVE-2026-79988 disclosed?
CVE-2026-79988 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79988 actively exploited?
CVE-2026-79988 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 82.6% of all scored CVEs.
What is the CVSS score of CVE-2026-79988?
CVE-2026-79988 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-79988?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79988, 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-2026-79988

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