{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-6679 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-6679 is a high-severity vulnerability in Wolfssl Wolfssl, published on 25 Jun 2026."},"fix_prompt":"Check this codebase for CVE-2026-6679 and fix it if it is affected.\n\nWhat it is: CVE-2026-6679 is a high-severity vulnerability in Wolfssl Wolfssl, published on 25 Jun 2026. \nExploitation: There is no known exploitation of CVE-2026-6679 in the wild and no public exploit code.\n\nAffected product: Wolfssl Wolfssl. 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-2026-6679/ (Markdown: https://insights.sbomify.com/CVE-2026-6679/index.md)","id":"CVE-2026-6679","markdown":"https://insights.sbomify.com/CVE-2026-6679/index.md","name":"CVE-2026-6679","record":{"aliases":["DEBIAN-CVE-2026-6679","GHSA-c9q2-5c67-xg9p","JLSEC-2026-753","UBUNTU-CVE-2026-6679"],"analysis":null,"analysis_generated_by":null,"assigner":"wolfSSL","cpe":[{"product":"wolfssl","vendor":"wolfssl"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-197","name":"Numeric Truncation Error"},{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"A heap buffer overflow could occur in the DTLS 1.3 ACK serialization path before the connecting peer is authenticated. The buffer overflow was due to an integer truncation when computing the length of the ACK record-number list, causing an undersized buffer to be allocated and then overrun. This affects builds using DTLS 1.3 and wolfSSL version 5.9.0 and earlier. A fix was added to the 5.9.1 release.","ecosystems":[],"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":"DTLS 1.3 ACK serialization heap buffer overflow via integer truncation","id":"CVE-2026-6679","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"wolfssl:wolfssl","products":["wolfssl:wolfssl"],"type":null,"year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"PKCS#7 decode ignores caller output buffer size, writing past buffer bounds","id":"CVE-2026-6681"},"packages":[],"prev":{"headline":"Integer underflow in wc_PKCS7_DecryptOri handling crafted Other Recipient Info","id":"CVE-2026-6678"},"products":["wolfSSL"],"published":"2026-06-25","related":[{"cvss_score":10,"headline":"Buffer overread in domain name matching","id":"CVE-2024-5991","kev_date_added":null,"published":"2024-08-27"},{"cvss_score":9.8,"headline":"Security feature bypass in n/a","id":"CVE-2021-37155","kev_date_added":null,"published":"2021-07-21"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-36177","kev_date_added":null,"published":"2021-01-06"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2014-2896","kev_date_added":null,"published":"2020-01-28"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2014-2897","kev_date_added":null,"published":"2020-01-28"},{"cvss_score":9.8,"headline":"Information disclosure in n/a","id":"CVE-2014-2898","kev_date_added":null,"published":"2020-01-28"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2019-16748","kev_date_added":null,"published":"2019-09-24"}],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-26","vendors":["wolfSSL"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-6679/"}