{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51538 exists.","fix":"No fix has been published for CVE-2026-51538 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-51538 is a critical authentication bypass vulnerability in n/a, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-51538 and fix it if it is affected.\n\nWhat it is: CVE-2026-51538 is a critical authentication bypass vulnerability in n/a, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51538 exists.\n\nAffected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-51538/ (Markdown: https://insights.sbomify.com/CVE-2026-51538/index.md)","id":"CVE-2026-51538","markdown":"https://insights.sbomify.com/CVE-2026-51538/index.md","name":"CVE-2026-51538","record":{"aliases":["GHSA-jcwf-w8h2-gq3f"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial Ethernet Protocol Stack","requires_auth":"none","summary":"Attackers can hijack sessions by reusing valid handles from other clients, bypassing access controls in OpENer industrial protocol stacks.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"opener","vendor":"opener_project"}],"cvss":{"score":9.1,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided session_handle exists in the global session list, but it fails to verify whether that handle belongs to the specific TCP connection issuing the request. Because there is no strong binding between a session handle and its originating socket, any attacker on the network can use a valid session handle created by another legitimate client to bypass access controls.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Auth bypass in n/a","id":"CVE-2026-51538","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Denial of service in n/a","id":"CVE-2026-51539"},"packages":[],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2026-51537"},"products":["n/a"],"published":"2026-07-13","related":[{"cvss_score":10,"headline":"Memory corruption in OpENer","id":"CVE-2022-43604","kev_date_added":null,"published":"2023-03-16"},{"cvss_score":10,"headline":"Memory corruption in OpENer","id":"CVE-2022-43605","kev_date_added":null,"published":"2023-03-16"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2026-51540","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.8,"headline":"Memory corruption in EIP Stack Group","id":"CVE-2020-13556","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":9.1,"headline":"Integer overflow in n/a","id":"CVE-2026-51536","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.1,"headline":"Memory corruption in n/a","id":"CVE-2026-51537","kev_date_added":null,"published":"2026-07-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-14","vendors":["n/a"]},"summary":"Attackers can hijack sessions by reusing valid handles from other clients, bypassing access controls in OpENer industrial protocol stacks.","url":"https://insights.sbomify.com/CVE-2026-51538/"}