8.1

CVE-2026-46638: symfony twig Protection Mechanism Failure

CVSS: 8.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-46638DEBIAN-CVE-2026-46638CGA-fgqp-fj6m-p5xx
Published 14-07-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-46638 is a high (CVSS 8.1) Protection Mechanism Failure vulnerability in symfony twig. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.8% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (NVD)
EPSS score
0.47%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-643P-7FR4-26V8

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

Description

Twig is a template language for PHP. Prior to 3.26.0, {% sandbox %}{% include %} can include a template that was previously loaded outside the sandbox without re-invoking checkSecurity(), allowing the cached template to use tags, filters, and functions that should have been denied by SecurityPolicy::checkSecurity(). This issue is fixed in version 3.26.0.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

0.00 pp

From 0.47% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard1 product
  • drupal-11.3< 11.3.10-r0
Debian1 product
  • php-twigAll versions (No fix recorded) | < 3.27.0-0+deb13u1 | < 3.26.0-1
Symfony1 product
Twigphp1 product
Ubuntu1 product
  • php-twigAll versions (No fix recorded)

5 vendors · 5 products

References

9 links