{"id":"PYSEC-2026-504","summary":"Buffer overflow in sponge queue functions","details":"### Impact\n\nThe Keccak sponge function interface accepts partial inputs to be absorbed and partial outputs to be squeezed. A buffer can overflow when partial data with some specific sizes are queued, where at least one of them has a length of 2^32 - 200 bytes or more.\n\n### Patches\n\nYes, see commit [fdc6fef0](https://github.com/XKCP/XKCP/commit/fdc6fef075f4e81d6b1bc38364248975e08e340a).\n \n### Workarounds\n\nThe problem can be avoided by limiting the size of the partial input data (or partial output digest) below 2^32 - 200 bytes. Multiple calls to the queue system can be chained at a higher level to retain the original functionality. Alternatively, one can process the entire input (or produce the entire output) at once, avoiding the queuing functions altogether.\n\n### References\n\nSee [issue #105](https://github.com/XKCP/XKCP/issues/105) for more details.\n","aliases":["BIT-libphp-2022-37454","BIT-libpython-2022-37454","BIT-php-2022-37454","BIT-php-min-2022-37454","BIT-python-2022-37454","BIT-python-min-2022-37454","CVE-2022-37454","GHSA-6w4m-2xhg-2658","PSF-2022-11"],"modified":"2026-07-01T20:23:03.122139Z","published":"2026-06-29T11:50:42.592721Z","references":[{"type":"WEB","url":"https://github.com/XKCP/XKCP/security/advisories/GHSA-6w4m-2xhg-2658"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-37454"},{"type":"WEB","url":"https://github.com/XKCP/XKCP/issues/105"},{"type":"WEB","url":"https://github.com/johanns/sha3/issues/17"},{"type":"WEB","url":"https://github.com/tiran/pysha3/issues/29"},{"type":"WEB","url":"https://github.com/XKCP/XKCP/commit/fdc6fef075f4e81d6b1bc38364248975e08e340a"},{"type":"WEB","url":"https://github.com/johanns/sha3/commit/5f2e8118a62831911703c8753ff2435c3b5d7312"},{"type":"WEB","url":"https://www.debian.org/security/2022/dsa-5269"},{"type":"WEB","url":"https://www.debian.org/security/2022/dsa-5267"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202305-02"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=35050307"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=33281106"},{"type":"WEB","url":"https://mouha.be/sha-3-buffer-overflow"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CMIEXLMTW5GO36HTFFWIPB3OHZXCT3G4"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ALQ6BDDPX5HU5YBQOBMDVAA2TSGDKIJ"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMIEXLMTW5GO36HTFFWIPB3OHZXCT3G4"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3ALQ6BDDPX5HU5YBQOBMDVAA2TSGDKIJ"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00000.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2022/10/msg00041.html"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sha3/CVE-2022-37454.yml"},{"type":"WEB","url":"https://eprint.iacr.org/2023/331"},{"type":"WEB","url":"https://csrc.nist.gov/projects/hash-functions/sha-3-project"},{"type":"PACKAGE","url":"https://pypi.org/project/pysha3"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-6w4m-2xhg-2658"}],"affected":[{"package":{"name":"pysha3","ecosystem":"PyPI","purl":"pkg:pypi/pysha3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.2"}]}],"versions":["0.1","0.2","0.2.1","0.2.2","0.3","1.0.0","1.0.1","1.0.2","1.0.2.dev1","1.0b1"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/pysha3/PYSEC-2026-504.yaml"}}],"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:H/A:H"}]}