CVE-2026-76839

Summary

Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.

Affected Software

Weaknesses

• CWE-522: Insufficiently Protected Credentials

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx

References

• https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx
• https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget

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