{"answers":{"affected":"3 open source packages ship an affected version, including github.com/mattermost/mattermost-plugin-msteams. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-2476 in the wild and no public exploit code.","fix":"Upgrade github.com/mattermost/mattermost-plugin-msteams to 1.15.1-0.20260102165339-036c761bd3cb or later.","what":"CVE-2026-2476 is a high-severity vulnerability in Mattermost, published on 16 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-2476 and fix it if it is affected.\n\nWhat it is: CVE-2026-2476 is a high-severity vulnerability in Mattermost, published on 16 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-2476 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/mattermost/mattermost-plugin-msteams (Go): affected all versions; fixed in 1.15.1-0.20260102165339-036c761bd3cb\n- github.com/mattermost/mattermost-plugin-msteams (Go): affected all versions; fixed in 1.15.1-0.20260102165339-036c761bd3cb\n- github.com/mattermost/mattermost-plugin-msteams (Go): affected all versions; fixed in 1.15.1-0.20260102165339-036c761bd3cb\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-2026-2476/ (Markdown: https://insights.sbomify.com/CVE-2026-2476/index.md)","id":"CVE-2026-2476","markdown":"https://insights.sbomify.com/CVE-2026-2476/index.md","name":"CVE-2026-2476","record":{"aliases":["GHSA-4ppj-6chv-5pgc","GO-2026-4784"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Mattermost plugin","requires_auth":"high_privilege","summary":"Attackers with access to support packets can obtain unmasked sensitive plugin configuration values from Mattermost plugins.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mattermost","cpe":[{"product":"ms_teams","vendor":"mattermost"}],"cvss":{"score":7.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"Mattermost Plugins versions \u003c=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"MS Teams plugin sensitive config values not properly masked in support packets","id":"CVE-2026-2476","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Server-side request forgery in Responsive Lightbox \u0026 Gallery","id":"CVE-2026-2479"},"packages":[{"ecosystem":"Go","fixed":["1.15.1-0.20260102165339-036c761bd3cb"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-plugin-msteams","purl":null,"source":"GHSA-4ppj-6chv-5pgc"},{"ecosystem":"Go","fixed":["1.15.1-0.20260102165339-036c761bd3cb"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-plugin-msteams","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-msteams","source":"GHSA-4ppj-6chv-5pgc"},{"ecosystem":"Go","fixed":["1.15.1-0.20260102165339-036c761bd3cb"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-plugin-msteams","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-msteams","source":"GO-2026-4784"}],"prev":{"headline":"Security Vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access","id":"CVE-2026-2475"},"products":["Mattermost"],"published":"2026-03-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-16","vendors":["Mattermost"]},"summary":"Attackers with access to support packets can obtain unmasked sensitive plugin configuration values from Mattermost plugins.","url":"https://insights.sbomify.com/CVE-2026-2476/"}