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

> CVE-2026-63458 (GitHub advisory GHSA-cjgj-2fwf-4c2w) is a high-severity vulnerability with a CVSS 4.0 base score of 7.1, classed as Authorization Bypass Through User-Controlled Key (CWE-639), in github.com/perses/perses (Go). Affected versions: < 0.54.0-beta.3. It is fixed in 0.54.0-beta.3.

Canonical page: https://cveminer.com/vulnerabilities/CVE-2026-63458

| Field | Value |
| --- | --- |
| CVE | CVE-2026-63458 |
| GHSA | GHSA-cjgj-2fwf-4c2w |
| Severity | High |
| CVSS 4.0 | 7.1 `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` (GitHub Advisory Database) |
| CWE | CWE-639 Authorization Bypass Through User-Controlled Key |
| EPSS | 0.3% (higher than 23% of CVEs) |
| CISA KEV | Not listed |
| SSVC | exploitation none, automatable no, technical impact partial |
| Published | 18 Sept 2026 |
| Modified | 18 Sept 2026 |

## Description

##### Impact
_What kind of vulnerability is it?_

An authenticated user who is only a viewer on project team-a requests GET /api/v1/projects/team-a/dashboards?project=finance-secret (or simply GET /api/v1/datasources?project=finance-secret) and receives the full list of the finance-secret project's dashboards and datasource specifications, despite having no role on that project. This defeats Perses' project-level tenant isolation for all project-scoped read resources.

_Who is impacted?_

Any authenticated user reads every project's dashboards, datasources, variables across tenants.

##### Patches
_Has the problem been patched? What versions should users upgrade to?_

##### Workarounds
None

## Affected packages

| Package | Ecosystem | PURL | Vulnerable versions | Fixed in |
| --- | --- | --- | --- | --- |
| github.com/perses/perses | Go | `pkg:golang/github.com/perses/perses` | < 0.54.0-beta.3 | 0.54.0-beta.3 |

## Fix commits

- Patch: https://github.com/perses/perses/commit/8015fb340bdc625953e73a7a688be5b939159540
- Release: https://github.com/perses/perses/commit/823d025f35d555fe7fed03d765b6412a2db8f45b (0.54.0-beta.3)

## Questions

**What is the GHSA ID for CVE-2026-63458?**

GitHub tracks CVE-2026-63458 as GHSA-cjgj-2fwf-4c2w.

**What is the CVSS score of CVE-2026-63458?**

CVE-2026-63458 has a CVSS 4.0 base score of 7.1 (High), 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.

**Which versions are affected by CVE-2026-63458?**

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

**How do I fix CVE-2026-63458?**

Upgrade to 0.54.0-beta.3 or later. The fix is in commit 8015fb3.

**What is the Package URL (PURL) for CVE-2026-63458?**

The affected package's PURL is pkg:golang/github.com/perses/perses.

**Is CVE-2026-63458 exploited in the wild?**

CISA's Known Exploited Vulnerabilities catalog doesn't list CVE-2026-63458. That means no confirmed exploitation has been catalogued, not that it is safe to leave unpatched. CISA's SSVC assessment rates exploitation as "none". EPSS estimates a 0.3% chance of exploitation in the next 30 days, higher than 23% of CVEs.

## References

- https://github.com/perses/perses/commit/8015fb340bdc625953e73a7a688be5b939159540 (fix)
- https://github.com/perses/perses/security/advisories/GHSA-cjgj-2fwf-4c2w (advisory)
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63458.json (advisory)
- https://nvd.nist.gov/vuln/detail/CVE-2026-63458 (advisory)
- https://github.com/advisories/GHSA-cjgj-2fwf-4c2w (advisory)
- https://github.com/perses/perses (package)
- https://github.com/perses/perses/releases/tag/v0.54.0-beta.3

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Source: CVEminer (https://cveminer.com/vulnerabilities/CVE-2026-63458), compiled from OSV (GitHub advisory), GitHub Advisory Database, OSV (CVE record), CVE.org, CISA KEV catalog. OSV and GitHub Advisory Database content is licensed CC BY 4.0.