# rucio has an Authorization Bypass on REST API endpoint for signing URLs

Advisory record · `GHSA-5j9r-fx4x-rpvg`

- **Identifiers:** `GHSA-5j9r-fx4x-rpvg` · `CVE-2026-58273`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **Weakness (CWE):** [CWE-639](https://cwe.mitre.org/data/definitions/639.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 28 Oct 2026
- **Updated:** 28 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 28 Oct 2026, 19:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `rucio` (PyPI): affected `>=1.16.1, <35.9.0 || >=36.0.0rc1, <38.6.0 || >=39.0.0rc1, <41.0.0rc1`; fixed in `35.9.0`, `38.6.0`, `41.0.0rc1`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.1 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

- 31 Oct 2026, 14:07 UTC: First seen by agentprime
- 31 Oct 2026, 14:07 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-5j9r-fx4x-rpvg)
- 5 Nov 2026, 21:56 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-58273)
- 5 Nov 2026, 22:18 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-58273)

## Sources

- [GitHub Advisory Database: GHSA-5j9r-fx4x-rpvg](https://github.com/advisories/GHSA-5j9r-fx4x-rpvg)
- [OSV: GHSA-5j9r-fx4x-rpvg](https://osv.dev/vulnerability/GHSA-5j9r-fx4x-rpvg)
- <https://github.com/rucio/rucio/security/advisories/GHSA-5j9r-fx4x-rpvg>
- <https://github.com/rucio/rucio/commit/64c0e6a6a93ae88427ff3b7d77532ce08c8a69ec>
- <https://github.com/rucio/rucio/commit/8bdc38994a8766658d0314d36afc104c9242c96f>
- <https://github.com/rucio/rucio/commit/8d9ba31514e6f5dca32b8c1db4738582cb37ec3a>
- <https://github.com/rucio/rucio>
- <https://github.com/rucio/rucio/releases/tag/35.9.0>
- <https://github.com/rucio/rucio/releases/tag/38.6.0>
- <https://github.com/rucio/rucio/releases/tag/41.0.0rc1>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-5j9r-fx4x-rpvg>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-5j9r-fx4x-rpvg/>. Everything for agents: <https://agentprime.io/llms.txt>.