Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-55866— SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected

Quick assessment

Affected
authzed spicedb
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.

SpiceDB 是一个用于创建和管理安全关键型应用程序权限的开源数据库系统。在 1.34.0 到 1.54.0 版本中，由于 中的 和 在构建 dispatch Check 缓存键时省略了 ，SpiceDB 可能会错误地返回 ，而不是返回 或 。 这种错误的结果需要满足以下所有条件： 1. 权限关系涉及交集（intersection）或排除（exclusion）的组合关系； 2. 主体可通过带限定条件（caveated）和不带限定条件（non-caveated）的不同分支到达； 3. 带有 参数的 与针对相同资源和

CVSS 3.7 · Low

Possible ATT&CK Techniques 1 AI

T1555 · Credentials from Password Stores

Affected Version Matrix 1

VendorProduct Version RangeStatus
authzed spicedb >= 1.34.1, < 1.54.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-55866

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected
Source: CVE Program / CVE List V5
Vulnerability Description
SpiceDB is an open source database system for creating and managing security-critical application permissions. From 1.34.0 until 1.54.0, SpiceDB can return PERMISSIONSHIP_HAS_PERMISSION instead of PERMISSIONSHIP_CONDITIONAL_PERMISSION or PERMISSIONSHIP_NO_PERMISSION because checkRequestToKey() and checkRequestToKeyWithCanonical() in internal/dispatch/keys/computed.go omit CheckHints when constructing dispatch Check cache keys. The incorrect result requires a permission combining relations with intersection or exclusion, a subject reachable through caveated and non-caveated branches, LookupResources with a context parameter running concurrently with CheckPermission or CheckBulkPermissions for the same resource and subject, and an enabled dispatch result cache. Under these conditions, a result computed for one hint set can poison the cache entry used by a semantically different authorization check, allowing permission without satisfying the caveat. This issue is fixed in version 1.54.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
authzed spicedb >= 1.34.1, < 1.54.0 -

II. Public POCs for CVE-2026-55866

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-55866

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-55866 (3)

Vendor Advisories for CVE-2026-55866 (1)

Vendor Pages for CVE-2026-55866 (1)

IV. Related Vulnerabilities

Same product: spicedb
Same vendor: authzed
Same weakness: CWE-863

V. Comments for CVE-2026-55866

No comments yet

Leave a comment