{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43994 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-43994 is a high-severity memory corruption vulnerability in coturn, published on 18 Jun 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-2026-43994 and fix it if it is affected.\n\nWhat it is: CVE-2026-43994 is a high-severity memory corruption vulnerability in coturn, published on 18 Jun 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-2026-43994 exists.\n\nAffected product: coturn. 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-2026-43994/ (Markdown: https://insights.sbomify.com/CVE-2026-43994/index.md)","id":"CVE-2026-43994","markdown":"https://insights.sbomify.com/CVE-2026-43994/index.md","name":"CVE-2026-43994","record":{"aliases":["DEBIAN-CVE-2026-43994","GHSA-74pg-rfh2-5qw5","UBUNTU-CVE-2026-43994"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"TURN/STUN server","requires_auth":"none","summary":"Attacker can achieve remote code execution via stack buffer overflow in Coturn's OAuth token decoding when OAuth mode is enabled.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"coturn","vendor":"coturn_project"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"Coturn is a free open source implementation of TURN and STUN Server. Versions prior to 4.10.0 contain a stack buffer overflow in decode_oauth_token_gcm(). A uint16_t nonce_len field read from an attacker-supplied OAuth access token (0-65535) is passed directly to memcpy() as the copy length into a 256-byte stack buffer (oauth_encrypted_block.nonce[256]) without bounds checking. The overflow occurs before AES-GCM authentication is verified, the attacker does not need to know the OAuth key or produce a valid AES-GCM token. Up to 735 bytes of attacker-controlled data are written past the buffer, may corrupt adjacent stack data, including control-flow data depending on compiler, ABI, and mitigations. Requires --oauth mode (non-default). This may provide a plausible RCE primitive depending on exploit mitigations; because coturn is widely deployed for WebRTC TURN/STUN and --oauth is commonly recommended, impact can be broad. This issue has been fixed in version 4.10.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Coturn: Stack buffer overflow in decode_oauth_token_gcm()","id":"CVE-2026-43994","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Flowise: SSRF Protection Bypass via Direct node-fetch / axios Usage (Patch Enforcement Failure)","id":"CVE-2026-43995"},"packages":[],"prev":{"headline":"JunoClaw: SSRF in WAVS computeDataVerify allows cloud-metadata and internal-service access","id":"CVE-2026-43993"},"products":["coturn"],"published":"2026-06-18","related":[{"cvss_score":9.1,"headline":"SQL injection in coTURN","id":"CVE-2018-4056","kev_date_added":null,"published":"2019-02-05"},{"cvss_score":7.7,"headline":"Server-side request forgery in coTURN","id":"CVE-2018-4058","kev_date_added":null,"published":"2019-03-21"},{"cvss_score":7.5,"headline":"Coturn: Misaligned Memory Access in coturn STUN Attribute Parser (Remote DoS on ARM64)","id":"CVE-2026-40613","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":7.4,"headline":"Coturn: IPv4-mapped 127.0.0.1 bypasses default loopback peer protection","id":"CVE-2026-53450","kev_date_added":null,"published":"2026-07-10"},{"cvss_score":7.2,"headline":"Coturn: SQL Injection in HTTPS Admin Panel Delete Operations","id":"CVE-2026-53448","kev_date_added":null,"published":"2026-07-10"},{"cvss_score":7.2,"headline":"Coturn: IPv4-mapped IPv6 (::ffff:0:0/96) bypasses denied-peer-ip ACL","id":"CVE-2026-27624","kev_date_added":null,"published":"2026-02-25"}],"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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-22","vendors":["coturn"]},"summary":"Attacker can achieve remote code execution via stack buffer overflow in Coturn's OAuth token decoding when OAuth mode is enabled.","url":"https://insights.sbomify.com/CVE-2026-43994/"}