{"id":"CVE-2026-103956","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103956","generatedAt":"2026-10-28T10:48:17.320Z","title":"Missing authentication for critical function in the authentication dependency in Loom for AWS before 1.6.1 allowed remote actors to obtain super-admin authority over the agent control plane, including registering tool servers, reading stored integration…","description":"Missing authentication for critical function in the authentication dependency in Loom for AWS before 1.6.1 allowed remote actors to obtain super-admin authority over the agent control plane, including registering tool servers, reading stored integration credentials, and rewriting the IAM role policies attached to managed agent roles, via any request to the application API in a deployment where no identity provider is configured.\n\n\n\nTo remediate this issue, users should upgrade to version 1.6.1 or later.","published":"2026-10-02T19:16:40.000Z","lastModified":"2026-10-06T14:49:41.000Z","status":"Awaiting Analysis","sourceIdentifier":"ff89ba41-3aa1-4d27-914a-91399e9639e5","cvss":{"version":"4.0","score":10,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-306","CWE-1188"],"affected":[],"epss":{"score":0.02494,"percentile":0.84582,"date":"2026-10-27","history":[{"date":"2026-10-03","score":0.00468,"percentile":0.38312},{"date":"2026-10-23","score":0.01695,"percentile":0.76973}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-02T19:16:40.000Z","detail":{"score":"10.0","severity":"CRITICAL","publishedAt":"2026-10-02T19:16:39.750Z"},"summary":"New CVE, critical severity (CVSS 10.0)."}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-124-aws/","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/awslabs/loom/releases/tag/v1.6.1","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/awslabs/loom/security/advisories/GHSA-vgmj-998f-r8mp","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103956","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}