# CVE-2026-63199: Perses's missing authorization in datasource proxy allows cross-scope secret disclosure

> CVE-2026-63199 (GitHub advisory GHSA-4227-9989-jrhx) is a high-severity vulnerability with a CVSS 4.0 base score of 8.3, classed as Missing Authorization (CWE-862), in github.com/perses/perses (Go). Affected versions: >= 0.43.0, < 0.54.0-rc.0. It is fixed in 0.54.0-rc.0.

Canonical page: https://cveminer.com/vulnerabilities/CVE-2026-63199

| Field | Value |
| --- | --- |
| CVE | CVE-2026-63199 |
| GHSA | GHSA-4227-9989-jrhx |
| Severity | High |
| CVSS 4.0 | 8.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N` (GitHub Advisory Database) |
| CWE | CWE-862 Missing Authorization |
| EPSS | 0.26% (higher than 19% of CVEs) |
| CISA KEV | Not listed |
| Published | 18 Sept 2026 |
| Modified | 18 Sept 2026 |

## Description

##### Impact

The datasource proxy authorizes the caller on the Datasource scope, then resolves and decrypts any Secret named in the request body with no Secret-scope check.

Datasource and Secret are distinct, independently grantable role scopes, so an operator can grant datasource access without secret access. The proxy and the service to create a datasource does not verify that the operator has the correct right.

A user holding only `GlobalDatasource:create` can create a `GlobalDatasource` and attached to it a `GlobalSecret` without having the right to get access to. The user can also do the same by using the `unSaved datasource` feature proposed by the proxy used to verify the connectivity to the datasource before creating the resource.

As soon as you can attach a secret that you don't have right to see, you can then create a Datasource that you control and then read anything send by Perses. Which include the secret in plain text. You can then have access to the secret without being granted to.

The project-scoped variant does the same within a project.

##### Patches
The proxy and the service to create the datasource is verifying if you have the right to read a secret if a secret is attached to the datasource.
This is patch in v0.54.0-rc.0

##### Workarounds
This issue can be avoided by using the provisioning to create the datasource and by removing the right to create datasource.

## Affected packages

| Package | Ecosystem | PURL | Vulnerable versions | Fixed in |
| --- | --- | --- | --- | --- |
| github.com/perses/perses | Go | `pkg:golang/github.com/perses/perses` | >= 0.43.0, < 0.54.0-rc.0 | 0.54.0-rc.0 |

## Fix commits

- Patch: https://github.com/perses/perses/commit/2368c9ef4eb0a70fbca5df69aa20e595821ab625
- Release: https://github.com/perses/perses/commit/8a64dc1cbba8667597e827fdab28dda20b541466 (0.54.0-rc.0)

## Questions

**What is the GHSA ID for CVE-2026-63199?**

GitHub tracks CVE-2026-63199 as GHSA-4227-9989-jrhx.

**What is the CVSS score of CVE-2026-63199?**

CVE-2026-63199 has a CVSS 4.0 base score of 8.3 (High), vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N.

**Which versions are affected by CVE-2026-63199?**

github.com/perses/perses (Go): >= 0.43.0, < 0.54.0-rc.0.

**How do I fix CVE-2026-63199?**

Upgrade to 0.54.0-rc.0 or later. The fix is in commit 2368c9e.

**What is the Package URL (PURL) for CVE-2026-63199?**

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

**Is CVE-2026-63199 exploited in the wild?**

CISA's Known Exploited Vulnerabilities catalog doesn't list CVE-2026-63199. That means no confirmed exploitation has been catalogued, not that it is safe to leave unpatched. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 19% of CVEs.

## References

- https://github.com/perses/perses/commit/2368c9ef4eb0a70fbca5df69aa20e595821ab625 (fix)
- https://github.com/perses/perses/security/advisories/GHSA-4227-9989-jrhx (advisory)
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63199.json (advisory)
- https://nvd.nist.gov/vuln/detail/CVE-2026-63199 (advisory)
- https://github.com/advisories/GHSA-4227-9989-jrhx (advisory)
- https://github.com/perses/perses (package)
- https://github.com/perses/perses/releases/tag/v0.54.0-rc.0

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Source: CVEminer (https://cveminer.com/vulnerabilities/CVE-2026-63199), 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.