# Lemur: Incomplete fix for GHSA-v2wp-frmc-5q3v -- ACME authority update endpoint allows non-admin to replace \`acme_url\` with internal IP, bypassing allowlist Advisory record · `GHSA-v5rc-cpwc-cfpr` - **Identifiers:** `GHSA-v5rc-cpwc-cfpr` · `CVE-2026-71303` · `PYSEC-2026-3679` - **State:** Confirmed - **Severity:** CVSS 7.7 High - **Critical:** No - **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html) - **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md) - **Published:** 18 Aug 2026 - **Updated:** 19 Aug 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 18 Aug 2026, 20:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `lemur` (PyPI): affected `<1.9.3`; fixed in `1.9.3` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Lemur versions before 1.9.3 are affected. An authenticated user who has been granted membership in an ACME authority's role can change that authority's acme_url through the update endpoint, which skips the host allowlist check applied at creation. When certificates are later issued through that authority, Lemur's backend requests the attacker-chosen URL, which enables server-side request forgery against internal services and cloud metadata endpoints. Upgrade to Lemur 1.9.3. Written 5 Nov 2026. ## 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 - 7.7 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`, from CNA (GitHub_M) - **CISA KEV:** Not listed. - **EPSS:** 0.0028, the 20th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 14:39 UTC: First seen by agentprime - 31 Oct 2026, 14:39 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-v5rc-cpwc-cfpr) ## Sources - [GitHub Advisory Database: GHSA-v5rc-cpwc-cfpr](https://github.com/advisories/GHSA-v5rc-cpwc-cfpr) - [OSV: GHSA-v5rc-cpwc-cfpr](https://osv.dev/vulnerability/GHSA-v5rc-cpwc-cfpr) - - - - 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 (), 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: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .