# Apache Tomcat has an Improper Access Control, Incorrect Authorization vulnerability Advisory record · `GHSA-gcx9-497g-6cp6` - **Identifiers:** `GHSA-gcx9-497g-6cp6` · `BIT-tomcat-2026-65182` · `CVE-2026-65182` - **State:** Confirmed - **Severity:** CVSS 9.1 Critical - **Critical:** Yes: CVSS 9+ - **Weakness (CWE):** [CWE-284](https://cwe.mitre.org/data/definitions/284.html) · [CWE-863](https://cwe.mitre.org/data/definitions/863.html) - **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md) - **Published:** 26 Aug 2026 - **Updated:** 11 Sept 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 26 Aug 2026, 00:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Critical Critical, because: - CVSS score 9.1: 9.0 or more. How we decide what’s critical: ## Affected packages - `org.apache.tomcat:tomcat` (Maven): affected `>=11.0.0-M1, <11.0.25 || >=10.1.0-M1, <10.1.58 || >=9.0.0-M1, <9.0.121 || >=8.5.0, <=8.5.100 || >=7.0.0, <=7.0.109`; fixed in `11.0.25`, `10.1.58`, `9.0.121` - `org.apache.tomcat:tomcat-catalina` (Maven): affected `>=11.0.0-M1, <11.0.25 || >=10.1.0-M1, <10.1.58 || >=9.0.0-M1, <9.0.121 || >=8.5.0, <=8.5.100 || >=7.0.0, <=7.0.109`; fixed in `11.0.25`, `10.1.58`, `9.0.121` - `org.apache.tomcat.embed:tomcat-embed-core` (Maven): affected `>=11.0.0-M1, <11.0.25 || >=10.1.0-M1, <10.1.58 || >=9.0.0-M1, <9.0.121 || >=8.5.0, <=8.5.100 || >=7.0.0, <=7.0.109`; fixed in `11.0.25`, `10.1.58`, `9.0.121` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Apache Tomcat versions 11.0.0-M1 through 11.0.24, 10.1.0-M1 through 10.1.57, 9.0.0.M1 through 9.0.120, 8.5.0 through 8.5.100, and 7.0.0 through 7.0.109 are affected, along with the tomcat, tomcat-catalina and tomcat-embed-core Maven packages. When a constraint on a longer path is configured before a more restrictive constraint on a shorter sub-path, the source says the security constraint can be bypassed. The source does not describe the attacker's required access level. Upgrade to 11.0.25, 10.1.58, or 9.0.121, which fix the issue; no fix is listed for 8.5.x or 7.0.x. Written 2 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 - 9.1 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`, from GitHub Advisory Database - **CISA KEV:** Not listed. - **EPSS:** 0.0065, the 51st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 14:16 UTC: First seen by agentprime - 31 Oct 2026, 14:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-gcx9-497g-6cp6) ## Sources - [GitHub Advisory Database: GHSA-gcx9-497g-6cp6](https://github.com/advisories/GHSA-gcx9-497g-6cp6) - [OSV: GHSA-gcx9-497g-6cp6](https://osv.dev/vulnerability/GHSA-gcx9-497g-6cp6) - - - - - - - - - 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: .