{"id":"JLSEC-2026-678","summary":"In wolfSSL prior to 5.6.6, if callback functions are enabled (via the `WOLFSSL_CALLBACKS` flag),...","details":"In wolfSSL prior to 5.6.6, if callback functions are enabled (via the `WOLFSSL_CALLBACKS` flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (`WOLFSSL_CALLBACKS` is only intended for debugging).","modified":"2026-07-25T18:23:59.543203860Z","published":"2026-07-14T21:41:35.775Z","upstream":["CVE-2023-6936","GHSA-cwpg-8775-j56v","EUVD-2023-59134"],"database_specific":{"license":"CC-BY-4.0","sources":[{"published":"2024-02-20T22:15:08.197Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-6936","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6936","database_specific":{"status":"Modified"},"id":"CVE-2023-6936","imported":"2026-07-17T22:23:41.884Z","modified":"2026-06-17T06:51:43.160Z"},{"html_url":"https://github.com/advisories/GHSA-cwpg-8775-j56v","id":"GHSA-cwpg-8775-j56v","imported":"2026-07-17T22:23:42.047Z","modified":"2025-03-26T18:31:48Z","published":"2024-02-21T00:31:31Z","url":"https://api.github.com/advisories/GHSA-cwpg-8775-j56v"},{"url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2023-59134","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-59134","id":"EUVD-2023-59134","imported":"2026-07-17T22:23:50.518Z","modified":"2025-03-26T16:28:30Z","published":"2024-02-20T21:52:02Z"}]},"references":[{"type":"WEB","url":"https://github.com/advisories/GHSA-cwpg-8775-j56v"},{"type":"WEB","url":"https://github.com/wolfSSL/wolfssl/pull/6949"},{"type":"WEB","url":"https://github.com/wolfSSL/wolfssl/pull/6949/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6936"},{"type":"WEB","url":"https://www.wolfssl.com/docs/security-vulnerabilities"},{"type":"WEB","url":"https://www.wolfssl.com/docs/security-vulnerabilities/"}],"affected":[{"package":{"name":"wolfSSL_jll","ecosystem":"Julia","purl":"pkg:julia/wolfSSL_jll?uuid=98c43586-9870-5ae5-ab22-acc77b9bbdb5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.7.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-678.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}