CVE-2026-48806Twig: Sandbox `__toString()` policy bypass via dynamic mapping keys

Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). This issue is fixed in version 3.27.0.

7.1 HIGHEPSS 0.41%Not in KEVNVD: Analyzed

Last updated: 2026-10-24 22:10 UTC

OverviewCVSS details

7.1HIGHCVSS 4.0

Score source: GitHub_M (CNA)
NVD status: Analyzed
Published: Jul 14, 2026
Assigner: GitHub_M

Affected

Twig (twigphp)

Versions: < 3.27.0

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable no · Impact partial

EPSS · FIRST, scored Nov 7

0.41%chance of exploitation in 30 days

Higher than 36.37% of CVEs

CVSS 4.0 · GitHub_M (CNA)

7.1High

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: Low
User interaction: None
Confidentiality impact: High
Integrity impact: Low
Availability impact: None
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

9.1Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
7.1	HIGH	4.0GitHub_M (CNA)	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
9.1	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Details

CVE ID: CVE-2026-48806
Status: Analyzed
Assigner (CNA): GitHub_M
Published: Jul 14, 2026
Last modified: 2026-10-24 22:10 UTC
Weaknesses: CWE-693 · Protection Mechanism Failure
CWE-863 · Incorrect Authorization

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:22 UTC.