CVE-2026-48807 twigphp CVE debrief

Who should care

Developers and administrators using Twig template language for PHP should prioritize updating to version 3.27.0 or later to mitigate this HIGH severity vulnerability. Affected operators, platforms, and security teams should review system configurations and monitor for potential exploitation attempts.

Technical summary

The Twig template language for PHP has a vulnerability (CVE-2026-48807) that allows contained Stringable objects to be coerced to strings without consulting the sandbox policy. This issue is fixed in version 3.27.0. Affected systems using Twig prior to version 3.27.0 are potentially vulnerable. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity. Developers and administrators should review system configurations, monitor for potential exploitation attempts, and update Twig to version 3.27.0 or later to address the vulnerability. Affected product deployments should be identified and owners assigned for follow-up. Compensating controls for exposed systems should be reviewed while remediation is scheduled and verified.

Defensive priority

Update Twig to version 3.27.0 or later to address the vulnerability.

Recommended defensive actions

• Update Twig to version 3.27.0 or later
• Review and adjust sandbox policies for Traversable values
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Confirm whether affected product deployments exist in managed environments

Evidence notes

The CVE record and NVD detail provide information on the vulnerability and its fix. The vendor has released a patch (version 3.27.0) to address the issue. Affected systems using Twig template language for PHP prior to version 3.27.0 are potentially vulnerable. Defenders should verify system configurations, review sandbox policies, and monitor for potential exploitation attempts. Evidence is limited to public sources and may not cover all affected deployments.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.