{"id":"JLSEC-2026-686","summary":"Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt","details":"Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt. This issue is hit specifically with a call to the function `wc_XChaCha20Poly1305_Decrypt()` which is not used with TLS connections, only from direct calls from an application.","modified":"2026-07-25T18:24:46.154317064Z","published":"2026-07-14T21:41:35.775Z","upstream":["CVE-2025-11931","GHSA-h957-386q-gm5j","EUVD-2025-198522"],"database_specific":{"sources":[{"modified":"2026-06-17T08:31:25.877Z","published":"2025-11-21T23:15:43.690Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-11931","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11931","database_specific":{"status":"Analyzed"},"id":"CVE-2025-11931","imported":"2026-07-17T22:25:01.887Z"},{"modified":"2025-12-04T18:30:39Z","published":"2025-11-22T00:31:21Z","url":"https://api.github.com/advisories/GHSA-h957-386q-gm5j","html_url":"https://github.com/advisories/GHSA-h957-386q-gm5j","id":"GHSA-h957-386q-gm5j","imported":"2026-07-17T22:25:02.134Z"},{"published":"2025-11-21T22:57:32Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2025-198522","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-198522","id":"EUVD-2025-198522","imported":"2026-07-17T22:25:11.889Z","modified":"2025-12-08T15:38:46Z"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://github.com/advisories/GHSA-h957-386q-gm5j"},{"type":"WEB","url":"https://github.com/wolfSSL/wolfssl/pull/9223"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11931"}],"affected":[{"package":{"name":"wolfSSL_jll","ecosystem":"Julia","purl":"pkg:julia/wolfSSL_jll?uuid=98c43586-9870-5ae5-ab22-acc77b9bbdb5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"5.8.4+0"},{"fixed":"5.9.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-686.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:N/I:L/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}