{"id":"CVE-2023-40889","aliases":["GHSA-mhp6-jvpx-2p4m","PYSEC-2026-576"],"url":"https://o3.security/vulnerability/CVE-2023-40889","summary":"Heap-based buffer overflow in ZBar","details":"A heap-based buffer overflow exists in the qr_reader_match_centers function of ZBar 0.23.90. Specially crafted QR codes may lead to information disclosure and/or arbitrary code execution. To trigger this vulnerability, an attacker can digitally input the malicious QR code, or prepare it to be physically scanned by the vulnerable scanner.","published":"2023-08-29T00:00:00Z","modified":"2026-08-12T03:51:16.099532590Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01542,"percentile":0.72611,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"zbar","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://hackmd.io/%40cspl/B1ZkFZv23"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DC7V5YCLCPB36J2KY6WLZCABFLBRB665/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40889.json"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/25LZZQJGGZRPLKTRNRNOTAFQJIPS7WRP/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DC7V5YCLCPB36J2KY6WLZCABFLBRB665/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-40889"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2023/12/msg00001.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.099532590Z"}}