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Improper Verification of Cryptographic Signature

CVE-2026-46354

Low
0/10

Summary

`azureidentity.Validate()` verifies that the PKCS#7 signer certificate chains to a trusted Azure CA but never verifies the PKCS#7 signature itself. An attacker can embed a legitimate Azure certificate alongside arbitrary content e.g. `{"vmId":"<target>"}` and the forged `vmId` will be accepted returning the victim workspace agent's session token. The affected versions in github.com/coder/coder are through 0.27.3 and in github.com/coder/coder/v2 are prior to 2.24.5, 2.29.0 prior to 2.29.13, 2.30.0 prior to 2.30.8, 2.31.0 prior to 2.31.12, 2.32.0-rc.0 prior to 2.32.2 and 2.33.0-rc.0 prior to 2.33.3.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • NONE

CWE-347 - Improper Verification of Cryptographic Signature

A cryptographic protocol is meant to ensure that services are provided in a secure manner. An application with absent or improper verification of cryptographic signatures allows malicious users to feed false messages to valid users or to disclose sensitive data, subverting the goals of the protocol. This can lead to security failures such as false authentication, account hijacking, and privilege escalation.

References

Advisory Timeline

  • Published