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CVE-2026-5724 (GCVE-0-2026-5724)

Vulnerability from cvelistv5 – Published: 2026-04-10 21:06 – Updated: 2026-07-08 19:20
VLAI
Title
Missing Authentication on Streaming gRPC Replication Endpoint
Summary
The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a ClaimMapper and Authorizer are configured, unary RPCs enforce authentication and authorization, but the streaming AdminService/StreamWorkflowReplicationMessages endpoint accepted requests without credentials. This endpoint is registered on the same port as WorkflowService and cannot be disabled independently. An attacker with network access to the frontend port could open the replication stream without authentication. Data exfiltration is possible, but  only when a configured replication target is correctly configured and the attacker has knowledge of the cluster configuration, as the history service validates cluster IDs and peer membership before returning replication data. The fix was applied per release line: it is present in 1.28.4, 1.29.6, 1.30.4, 1.31.2, and 1.32.0 and later releases on each line. Releases 1.31.0 and 1.31.1 do not contain the fix and are affected. Temporal Cloud is not affected.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:L/SI:N/SA:N/S:N/AU:N/R:U/RE:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 16:10 UTC
CWE
  • CWE-306 - Missing authentication for critical function
Assigner
References
Impacted products
Vendor Product Version CPE status
Temporal Technologies, Inc. temporal Affected: 1.24.0 , < 1.28.4 (semver)
Affected: 1.29.0 , < 1.29.6 (semver)
Affected: 1.30.0 , < 1.30.4 (semver)
Affected: 1.31.0 , < 1.31.2 (semver)
guessed Create a notification for this product.
Credits
Tiberiu Baron of UiPath's security team
Show details on NVD website
To clipboard 

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        "assignerOrgId": "61241ed8-fa44-4f23-92db-b8c443751968",
        "assignerShortName": "Temporal",
        "cveId": "CVE-2026-5724",
        "datePublished": "2026-04-10T21:06:31.788Z",
        "dateReserved": "2026-04-06T21:59:05.129Z",
        "dateUpdated": "2026-07-08T19:20:28.034Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.