{"answers":{"affected":"3 open source packages ship an affected version, including github.com/oxia-db/oxia.","exploited":"There is no known exploitation of CVE-2026-40943 in the wild and no public exploit code.","fix":"Upgrade github.com/oxia-db/oxia to 0.16.2 or later.","what":"CVE-2026-40943 is a high-severity vulnerability in oxia-db oxia, published on 21 Apr 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-2026-40943 and fix it if it is affected.\n\nWhat it is: CVE-2026-40943 is a high-severity vulnerability in oxia-db oxia, published on 21 Apr 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-2026-40943 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/oxia-db/oxia (Go): affected all versions; fixed in 0.16.2\n- github.com/oxia-db/oxia (Go): affected all versions; fixed in 0.16.2\n- github.com/oxia-db/oxia (Go): affected all versions; fixed in 0.16.2\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-2026-40943/ (Markdown: https://insights.sbomify.com/CVE-2026-40943/index.md)","id":"CVE-2026-40943","markdown":"https://insights.sbomify.com/CVE-2026-40943/index.md","name":"CVE-2026-40943","record":{"aliases":["GHSA-5gqc-qhrj-9xw8","GO-2026-5145"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Oxia metadata store","requires_auth":"none","summary":"A race condition in Oxia's session heartbeat handling allows attackers to crash the server via a panic or deadlock.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"Oxia is a metadata store and coordination system. Prior to 0.16.2, a race condition between session heartbeat processing and session closure can cause the server to panic with send on closed channel. The heartbeat() method uses a blocking channel send while holding a mutex, and under specific timing with concurrent close() calls, this can lead to either a deadlock (channel buffer full) or a panic (send on closed channel after TOCTOU gap in KeepAlive). This vulnerability is fixed in 0.16.2.","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":"Oxia: Server crash via race condition in session heartbeat handling","id":"CVE-2026-40943","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles","id":"CVE-2026-40944"},"packages":[{"ecosystem":"Go","fixed":["0.16.2"],"introduced":["0"],"last_affected":[],"package":"github.com/oxia-db/oxia","purl":null,"source":"GHSA-5gqc-qhrj-9xw8"},{"ecosystem":"Go","fixed":["0.16.2"],"introduced":["0"],"last_affected":[],"package":"github.com/oxia-db/oxia","purl":"pkg:golang/github.com/oxia-db/oxia","source":"GHSA-5gqc-qhrj-9xw8"},{"ecosystem":"Go","fixed":["0.16.2"],"introduced":["0"],"last_affected":[],"package":"github.com/oxia-db/oxia","purl":"pkg:golang/github.com/oxia-db/oxia","source":"GO-2026-5145"}],"prev":{"headline":"DSF: Inverted Time Comparison in OIDC JWKS and Token Cache","id":"CVE-2026-40942"},"products":["oxia"],"published":"2026-04-21","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":"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":"2026-04-22","vendors":["oxia-db"]},"summary":"A race condition in Oxia's session heartbeat handling allows attackers to crash the server via a panic or deadlock.","url":"https://insights.sbomify.com/CVE-2026-40943/"}