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CVE-2026-54746— Hatchet: Cross-tenant write/DoS to other tenants' workers via Dispatcher gRPC UpsertWorkerLabels and Unsubscribe

Quick assessment

Affected
hatchet-dev hatchet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hatchet是Hatchet公司的任务调度与工作流引擎。 Hatchet 0.40.0版本至0.91.1之前版本存在授权问题漏洞，该漏洞源于Dispatcher gRPC服务未验证请求的worker ID是否属于bearer-token上下文标识的租户，具体涉及Dispatcher/UpsertWorkerLabels和Dispatcher/Unsubscribe接口，可能导致经过身份验证的租户所有者猜测其他租户的worker UUID并覆盖其affinity标签或断开连接，造成跨租户完整性影响和拒绝服

CVSS 6.4 · Medium EPSS 0.27% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
hatchet-dev hatchet >= 0.40.0, < 0.91.1 affected
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I. Basic Information for CVE-2026-54746

Vulnerability Information
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Vulnerability Title
Hatchet: Cross-tenant write/DoS to other tenants' workers via Dispatcher gRPC UpsertWorkerLabels and Unsubscribe
Source: CVE Program / CVE List V5
Vulnerability Description
Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. From 0.40.0 until 0.91.1, the Dispatcher gRPC service does not verify that a request's worker ID belongs to the tenant identified by the bearer-token context in Dispatcher/UpsertWorkerLabels and Dispatcher/Unsubscribe. An authenticated owner of any tenant who guesses another tenant's worker UUID can overwrite that worker's affinity labels or disconnect the worker from the dispatcher. This can cause cross-tenant integrity impact and denial of service on multi-tenant Hatchet Cloud or shared self-hosted deployments. Single-tenant deployments are not practically affected because the attacker and target tenant are the same. This issue is fixed in version 0.91.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Hatchet 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hatchet是Hatchet公司的任务调度与工作流引擎。 Hatchet 0.40.0版本至0.91.1之前版本存在授权问题漏洞，该漏洞源于Dispatcher gRPC服务未验证请求的worker ID是否属于bearer-token上下文标识的租户，具体涉及Dispatcher/UpsertWorkerLabels和Dispatcher/Unsubscribe接口，可能导致经过身份验证的租户所有者猜测其他租户的worker UUID并覆盖其affinity标签或断开连接，造成跨租户完整性影响和拒绝服
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hatchet-dev hatchet >= 0.40.0, < 0.91.1 -

II. Public POCs for CVE-2026-54746

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III. Intelligence Information for CVE-2026-54746

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Patches & Fixes for CVE-2026-54746 (1)

Vendor Advisories for CVE-2026-54746 (1)

Vendor Pages for CVE-2026-54746 (1)

IV. Related Vulnerabilities

Same product: hatchet
Same vendor: hatchet-dev
Same weakness: CWE-639

V. Comments for CVE-2026-54746

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