GHSA-vhvq-fv9f-wh4q: Github.com/authzed/spicedb Remote Code Execution Vulnerability

LOW
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CWE-248
Published
Advisory Summary

GHSA-vhvq-fv9f-wh4q is a LOW remote code execution vulnerability (CWE-248: Uncaught Exception) affecting Github.com/authzed/spicedb libraries in the Go ecosystem. The issue involves lookupresources cursor section tampering can crash spicedb process via tuple.mustparse panic. Remediation is available by upgrading affected packages to version 1.49.1.

GHSA-vhvq-fv9f-wh4q at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-vhvq-fv9f-wh4q
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-248: Uncaught Exception
Affected Product Github.com/authzed/spicedb
Package Ecosystem Go
Published Date
Last Updated

How to Fix GHSA-vhvq-fv9f-wh4q

To remediate this vulnerability, upgrade all affected Github.com/authzed/spicedb dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/authzed/spicedb fixed: 1.49.1 
Upgrade github.com/authzed/spicedb to 1.49.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/authzed/spicedb

How to Check if You Are Affected

To determine whether your application is affected by GHSA-vhvq-fv9f-wh4q, inspect your project dependencies for Github.com/authzed/spicedb:

inspect dependencies for github.com/authzed/spicedb

Analyze the terminal output to locate any version of Github.com/authzed/spicedb in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.49.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-248: Uncaught Exception, where an exception is thrown from a function, but it is not caught. In Github.com/authzed/spicedb, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Description A malformed or tampered-with LookupResources [Cursor token](https://buf.build/authzed/api/docs/main:authzed.api.v1#authzed.api.v1.Cursor) can cause a panic in the SpiceDB process if it fails to parse. If an attacker were able to make requests to a SpiceDB instance, they could affect its availability. ## Reproduction If one was to take a cursor from a LookupResources call, decode it according to the logic that SpiceDB uses, and modify the Sections field to include an invalid relationship string, the process will panic. ## Impact An attacker would need both the ability to create a gRPC connection to your SpiceDB instance and a valid token, or else the ability to pass a cursor token from outside your application through to your SpiceDB instance. If an attacker had this ability, they could bring down SpiceDB instances, reducing the availability of SpiceDB and any service that depends on it. ## Mechanism The SpiceDB process does not validate the contents of this `Sections` component of the `Cursor` message. In affected versions, it uses a parsing function that calls `panic` if the value cannot be parsed as a relationship. ## Fix This issue was fixed in https://github.com/authzed/spicedb/pull/2878. ## Remediations * Prevent client control of the `optional_cursor` field in `LookupResources` calls * Upgrade to an unaffected version

GHSA-vhvq-fv9f-wh4q Affected Github.com/authzed/spicedb Versions

1 component(s)
Fixed Versions:
1.49.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/authzed/spicedb
golang/github.com/authzed/spicedb
Go
≥ 1.29.3
< 1.49.1
1.49.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/authzed/spicedb/security/advisories/GHSA-vhvq-fv9f-wh4q
Github.com/authzed/spicedb Source Repository REPOSITORY
https://github.com/authzed/spicedb/pull/2878
Security Fix Commit FIX COMMIT
https://github.com/authzed/spicedb/commit/fa1d7f48107e0c6c35e6a7862aa983366e70208f
Github.com/authzed/spicedb Source Repository REPOSITORY
https://github.com/authzed/spicedb

Frequently Asked Questions

What is GHSA-vhvq-fv9f-wh4q?
GHSA-vhvq-fv9f-wh4q is a security vulnerability in Github.com/authzed/spicedb involving LookupResources Cursor section tampering can crash SpiceDB process via tuple.MustParse panic under CWE-248: Uncaught Exception.
Which Github.com/authzed/spicedb versions are affected?
Affected versions include releases prior to 1.49.1 across affected packages: github.com/authzed/spicedb.
What version fixes GHSA-vhvq-fv9f-wh4q?
Upgrading to 1.49.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/authzed/spicedb affected?
Yes, github.com/authzed/spicedb is affected in releases prior to 1.49.1. Upgrade your dependency to 1.49.1 or later.
What CWE is associated with GHSA-vhvq-fv9f-wh4q?
GHSA-vhvq-fv9f-wh4q is classified under CWE-248: Uncaught Exception (An exception is thrown from a function, but it is not caught.).
How can I check Go dependencies for GHSA-vhvq-fv9f-wh4q?
Run the dependency tree command: 'inspect dependencies for github.com/authzed/spicedb'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vhvq-fv9f-wh4q",
  "modified" : "2026-02-06T22:30:52Z",
  "published" : "2026-02-06T22:30:52Z",
  "aliases" : [ ],
  "summary" : "LookupResources Cursor section tampering can crash SpiceDB process via tuple.MustParse panic",
  "details" : "## Description\nA malformed or tampered-with LookupResources [Cursor token](https://buf.build/authzed/api/docs/main:authzed.api.v1#authzed.api.v1.Cursor) can cause a panic in the SpiceDB process if it fails to parse. If an attacker were able to make requests to a SpiceDB instance, they could affect its availability.\n\n## Reproduction\nIf one was to take a cursor from a LookupResources call, decode it according to the logic that SpiceDB uses, and modify the Sections field to include an invalid relationship string, the process will panic.\n\n## Impact\nAn attacker would need both the ability to create a gRPC connection to your SpiceDB instance and a valid token, or else the ability to pass a cursor token from outside your application through to your SpiceDB instance.\n\nIf an attacker had this ability, they could bring down SpiceDB instances, reducing the availability of SpiceDB and any service that depends on it.\n\n## Mechanism\nThe SpiceDB process does not validate the contents of this `Sections` component of the `Cursor` message. In affected versions, it uses a parsing function that calls `panic` if the value cannot be parsed as a relationship. \n\n## Fix\nThis issue was fixed in https://github.com/authzed/spicedb/pull/2878.\n\n## Remediations\n* Prevent client control of the `optional_cursor` field in `LookupResources` calls\n* Upgrade to an unaffected version",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/authzed/spicedb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.29.3"
      }, {
        "fixed" : "1.49.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/authzed/spicedb/security/advisories/GHSA-vhvq-fv9f-wh4q"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/authzed/spicedb/pull/2878"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/authzed/spicedb/commit/fa1d7f48107e0c6c35e6a7862aa983366e70208f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/authzed/spicedb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-248" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-06T22:30:52Z",
    "nvd_published_at" : null
  }
}