{"id":"CVE-2026-2303","aliases":["GO-2026-5327"],"url":"https://o3.security/vulnerability/CVE-2026-2303","summary":"mongo-go-driver has Heap Out-of-Bounds Read in GSSAPI Error Handling","details":"The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap out-of-bounds read vulnerability due to incorrect assumptions about string termination in the GSSAPI standard. Since GSSAPI buffers are not guaranteed to be null-terminated or have extra padding, this results in reading one byte past the allocated heap buffer.","published":"2026-02-10T21:31:31Z","modified":"2026-09-10T03:50:59.479851584Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"go.mongodb.org/mongo-driver","fixedVersion":"1.17.7"},{"ecosystem":"Go","name":"go.mongodb.org/mongo-driver/v2","fixedVersion":"2.4.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2303"},{"type":"PACKAGE","url":"https://github.com/mongodb/mongo-go-driver"},{"type":"WEB","url":"https://jira.mongodb.org/browse/GODRIVER-3770"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:50:59.479851584Z"}}