Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\Twig\\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent models and query builders using methods like saveQuietly(), deleteQuietly(), increment(), decrement(), and newQuery() to read and modify arbitrary database records, execute arbitrary SQL, and achieve remote code execution by injecting PHP into template code sections.
CVE-2026-79774
HIGHPre-NVD 8.48.4—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 8.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-25. a secondary CVSS source baseline 8.4; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 8.4Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.4
- EG Score
- 8.4(high)
- EG Risk
- 42(Track)EG Risk 42/100SSVC: 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 computedSeverity84% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
August 25, 2026
Last Modified
August 25, 2026
Advisory Details (2)
Auto-updated Aug 25, 2026Patch available. Sources: github, github_commit.
github_commit Patch Available
commit 725bbcda2324 (wintercms/winter)
Patch available: wintercms/winter v1.2.13 (contains commit 725bbcda2324)
https://github.com/wintercms/winter/commit/725bbcda232466f7f71381c271c6916573d576e6github Patch Available
Authenticated Twig sandbox escape in CMS SecurityPolicy (bypass of CVE-2024-54149) · Advisory · wintercms/winter · GitHub
https://github.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63wVendor Advisories for CVE-2026-79774(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 5× in last 7d / 5× 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.
- 2026-08-26 05:01 UTCEG score recompute
- 2026-08-26 05:01 UTCGHSA enrichment
- 2026-08-25 16:24 UTCEG score recompute
- 2026-08-25 15:30 UTCEG score recompute
- 2026-08-25 15:29 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-693
- CVE-2021-32835EG 9.9EPSS p91CRITICAL
- CVE-2019-10328EG 9.9CRITICAL
- CVE-2019-1003030EG 9.9 KEVEPSS p100CRITICAL
- CVE-2021-27497NVD 6.5EG 9.8CRITICAL
- CVE-2020-10887EG 9.8EPSS p90CRITICAL
- CVE-2017-3197EG 9.8EPSS p92CRITICAL
- CVE-2018-9318EG 9.8EPSS p90CRITICAL
- CVE-2018-9311EG 9.8EPSS p90CRITICAL
- CVE-2017-8864EG 9.8CRITICAL
- CVE-2013-2465EG 9.8 KEVEPSS p100CRITICAL
Frequently asked(4)
What is CVE-2026-79774?
CVE-2026-79774 is a high vulnerability published on August 25, 2026. Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\Twig\\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent…
When was CVE-2026-79774 disclosed?
CVE-2026-79774 was first published in the National Vulnerability Database on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-79774?
CVE-2026-79774 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-79774?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79774, 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-2026-79774
Is Your Infrastructure Affected by CVE-2026-79774?
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