{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-107121 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-107121 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-107121 is a medium-severity vulnerability in Red Hat Build of Keycloak, published on 7 Oct 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-2026-107121 and fix it if it is affected.\n\nWhat it is: CVE-2026-107121 is a medium-severity vulnerability in Red Hat Build of Keycloak, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-107121 in the wild and no public exploit code.\n\nAffected product: Red Hat Build of Keycloak. 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-2026-107121/ (Markdown: https://insights.sbomify.com/CVE-2026-107121/index.md)","id":"CVE-2026-107121","markdown":"https://insights.sbomify.com/CVE-2026-107121/index.md","name":"CVE-2026-107121","record":{"aliases":["GHSA-4276-jw29-xwhr"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Keycloak identity server","requires_auth":"none","summary":"Attackers can intercept SMTP traffic to capture plaintext credentials and emails when STARTTLS is enabled but fails to enforce encryption.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-319","name":"Cleartext Transmission of Sensitive Information"}],"description":"A flaw was found in the SMTP email configuration handling of the keycloak-services component. When the STARTTLS option is enabled, Keycloak fails to strictly enforce an encrypted connection, allowing it to fall back to unencrypted communication if the encryption request is tampered with. An attacker who can intercept network traffic can exploit this to capture sensitive email credentials and message content in plain text.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Keycloak-services: keycloak-services: smtp starttls plaintext credential and message downgrade","id":"CVE-2026-107121","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"XnView Classic FLI File heap-based overflow","id":"CVE-2026-107125"},"packages":[],"prev":{"headline":"Contest Gallery \u003c 33.0.1 - Unauthenticated Email Verification Bypass via Brute-Forceable Registration PIN","id":"CVE-2026-107120"},"products":["Red Hat Build of Keycloak","Red Hat Single Sign-On 7"],"published":"2026-10-07","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-10-07","vendors":["Red Hat"]},"summary":"Attackers can intercept SMTP traffic to capture plaintext credentials and emails when STARTTLS is enabled but fails to enforce encryption.","url":"https://insights.sbomify.com/CVE-2026-107121/"}