Resource exhaustion in Authzed Spicedb
CVE-2025-64529
SpiceDB is an open source database system for creating and managing security-critical application permissions. In versions prior to 1.45.2, users who use the exclusion operator somewhere in their authorization schema; have configured their SpiceDB server such that `--write-relationships-max-updates-per-call` is bigger than 6500; and issue calls to WriteRelationships with a large enough number of updates that cause the payload to be bigger than what their datastore allows; will receive a successful response from their `WriteRelationships` call, when in reality that call failed, and receive incorrect permission check results, if those relationships had to be read to resolve the relation involving the exclusion. Version 1.45.2 contains a patch for the issue. As a workaround, set `--write-relationships-max-updates-per-call` to `1000`.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (17.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Authzed Spicedb — versions < 1.45.2
Weakness classification (CWE)
References
- github.com/authzed/spicedb/security/advisories/GHSA-pm3x-jrhh-qcr7 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-64529?
- CVE-2025-64529 is a medium-severity vulnerability in Authzed Spicedb, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2025-11-10.
- How severe is CVE-2025-64529?
- Medium severity. CVSS v3 base score is 6.5 out of 10.