Twig is a template language for PHP. From 3.24.0 until 3.26.0, object-destructuring assignment compiles CoreExtension::getAttribute() with the sandbox argument hardcoded to false, disabling property and method policy checks and allowing an attacker with write access to a sandboxed Twig template to read public properties or invoke public getters on objects passed to the template engine. This issue is fixed in version 3.26.0.
CVE-2026-46639
HIGHPre-NVD 7.17.1Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.1 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 76% 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: cna:github_m, epss
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.1
- EG Score
- 7.1(low)
- EPSS
- 27.6%
- KEV
- Not listed
Published
May 21, 2026
Last Modified
July 15, 2026
Advisory Details (2)
Auto-updated Jul 15, 2026Patch available. Sources: github, github_release.
github Patch Available
Sandbox property and method bypass via object-destructuring assignment · Advisory · twigphp/Twig · GitHub
https://github.com/twigphp/Twig/security/advisories/GHSA-mm6w-gr99-p3jjgithub_release Patch Available
v3.26.0
Patch available: twigphp/Twig v3.26.0
https://github.com/twigphp/Twig/releases/tag/v3.26.0Vendor Advisories for CVE-2026-46639(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)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| twig/twig | v3.24.0, v3.25.0 | 3.26.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× 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.
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-14 21:36 UTCEG score recompute▲ 7.10
- 2026-07-14 21:35 UTCMITRE cvelistV5CVSS v3 → 7.1 · CVSS v4 → 7.1
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-13 23:00 UTCEPSS rescore
- 2026-06-13 22:02 UTCEG score recompute
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-05-24 06:10 UTCEG score recompute
Frequently asked(5)
What is CVE-2026-46639?
CVE-2026-46639 is a high vulnerability published on May 21, 2026. Twig is a template language for PHP. From 3.24.0 until 3.26.0, object-destructuring assignment compiles CoreExtension::getAttribute() with the sandbox argument hardcoded to false, disabling property and method policy checks and allowing an attacker with write access to a sandboxed Twig template to…
When was CVE-2026-46639 disclosed?
CVE-2026-46639 was first published in the National Vulnerability Database on May 21, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46639 actively exploited?
CVE-2026-46639 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46639?
CVE-2026-46639 has a CVSS v3 base score of 7.1 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-46639?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46639, 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-2026-46639
Is Your Infrastructure Affected by CVE-2026-46639?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.