Twig is a template language for PHP. From 3.15.0 until 3.26.0, _self.() and import-alias dynamic attribute syntax can concatenate an attacker-controlled string into a MacroReferenceExpression name without identifier validation, causing raw PHP to be emitted into the generated template source and executed at template-load time. This issue is fixed in version 3.26.0.
CVE-2026-46640
HIGHPre-NVD 8.78.7Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.7 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.1%, 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: cna:github_m, epss
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.7
- EG Score
- 8.7(low)
- EPSS
- 25.6%
- KEV
- Not listed
Published
May 21, 2026
Last Modified
July 15, 2026
Advisory Details (3)
Auto-updated Jul 14, 2026Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
v3.26.0
Patch available: twigphp/Twig v3.26.0
https://github.com/twigphp/Twig/releases/tag/v3.26.0github_commit Patch Available
commit 324fa6054569 (twigphp/Twig)
Patch available: twigphp/Twig v3.26.0 (contains commit 324fa6054569)
https://github.com/twigphp/Twig/commit/324fa60545694fa6abe85ded9befcb82e1066bc2github Patch Available
Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation · Advisory · twigphp/Twig · GitHub
https://github.com/twigphp/Twig/security/advisories/GHSA-45vw-wh46-2vx8Vendor Advisories for CVE-2026-46640(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 | v3.15.0 ... v3.25.0 (15 versions) | 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▲ 8.70
- 2026-07-14 21:35 UTCMITRE cvelistV5CVSS v3 → 8.7 · CVSS v4 → 8.7
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-14 04:58 UTCEG score recompute
- 2026-06-13 23:00 UTCEPSS rescore
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-05-24 06:10 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-94
- CVE-2006-1359NVD 0.0EG 9.0EPSS 99%NONE
- CVE-2005-1921NVD 0.0EG 9.0EPSS 100%NONE
- CVE-2005-3302EG 7.3HIGH
- CVE-2005-1876EG 4.5MEDIUM
- CVE-2003-1599EG 0.0NONE
- CVE-2006-1318EG 0.0EPSS 96%NONE
- CVE-2006-1301EG 0.0EPSS 95%NONE
- CVE-2006-1308EG 0.0EPSS 95%NONE
- CVE-2006-1309EG 0.0EPSS 95%NONE
- CVE-2006-1304EG 0.0EPSS 95%NONE
Frequently asked(5)
What is CVE-2026-46640?
CVE-2026-46640 is a high vulnerability published on May 21, 2026. Twig is a template language for PHP. From 3.15.0 until 3.26.0, _self.(<string>) and import-alias dynamic attribute syntax can concatenate an attacker-controlled string into a MacroReferenceExpression name without identifier validation, causing raw PHP to be emitted into the generated template…
When was CVE-2026-46640 disclosed?
CVE-2026-46640 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-2026-46640 actively exploited?
CVE-2026-46640 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46640?
CVE-2026-46640 has a CVSS v3 base score of 8.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-46640?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46640, 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-2026-46640
Is Your Infrastructure Affected by CVE-2026-46640?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.