{"id":"GHSA-q233-g92q-qxp6","summary":"snappy-java: Unbounded memory allocation from attacker-declared uncompressed lengtha","details":"### Impact\nSeveral decompression paths in snappy-java allocate an output buffer sized by the uncompressed length declared in the first bytes of the compressed data, before decompressing or validating it. A few bytes of crafted input can therefore force an allocation of up to 2 GB, causing `OutOfMemoryError` (denial of service), or a `NegativeArraySizeException` for declared lengths of 2^31 or more.\n\nAffected entry points include `Snappy.uncompress(byte[])`, `Snappy.uncompressString`, the `Snappy.uncompress*Array` methods, `SnappyInputStream`, and `SnappyFramedInputStream`. The `maxChunkSize` limit added for CVE-2023-43642 bounds only the compressed chunk length, so it does not prevent this.\n\n### Patches\nFixed in 1.1.10.9 (#739). `Snappy.uncompressedLength()` now rejects negative declared lengths, and lengths larger than any valid Snappy stream of the given size can produce. The densest Snappy element expands 3 bytes to 64, so the limit is 64/3 of the compressed size. Allocations are therefore proportional to the input actually received.\n\n### Workarounds\nBefore decompressing untrusted data, check that `Snappy.uncompressedLength(input)` is within an application-specific limit.","aliases":["CVE-2026-108106"],"modified":"2026-10-27T15:47:24.815707184Z","published":"2026-10-27T15:33:22Z","database_specific":{"github_reviewed_at":"2026-10-27T15:33:22Z","nvd_published_at":null,"cwe_ids":["CWE-770","CWE-789"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/xerial/snappy-java/security/advisories/GHSA-q233-g92q-qxp6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108106"},{"type":"WEB","url":"https://github.com/xerial/snappy-java/pull/739"},{"type":"WEB","url":"https://github.com/xerial/snappy-java/commit/943c6043a292568575e8347af4507d015e802c75"},{"type":"PACKAGE","url":"https://github.com/xerial/snappy-java"},{"type":"WEB","url":"https://github.com/xerial/snappy-java/blob/v1.1.10.8/src/main/java/org/xerial/snappy/Snappy.java#L517"},{"type":"WEB","url":"https://github.com/xerial/snappy-java/releases/tag/v1.1.10.9"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/xerial-snappy-java-before-1.1.10.9-unbounded-memory-allocation-denial-of-service"}],"affected":[{"package":{"name":"org.xerial.snappy:snappy-java","ecosystem":"Maven","purl":"pkg:maven/org.xerial.snappy/snappy-java"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.10.9"}]}],"versions":["1.0.1-rc1","1.0.1-rc2","1.0.1-rc3","1.0.1-rc4","1.0.3","1.0.3-rc1","1.0.3-rc2","1.0.3-rc3","1.0.3-rc4","1.0.3.1","1.0.3.2","1.0.3.3","1.0.4","1.0.4.1","1.0.5","1.0.5-M1","1.0.5-M2","1.0.5-M3","1.0.5-M4","1.0.5.1","1.0.5.2","1.0.5.3","1.0.5.4","1.1.0","1.1.0-M1","1.1.0-M2","1.1.0-M3","1.1.0-M4","1.1.0.1","1.1.1","1.1.1-M1","1.1.1-M2","1.1.1-M3","1.1.1-M4","1.1.1.1","1.1.1.2","1.1.1.3","1.1.1.4","1.1.1.5","1.1.1.6","1.1.1.7","1.1.10.0","1.1.10.1","1.1.10.2","1.1.10.3","1.1.10.4","1.1.10.5","1.1.10.6","1.1.10.7","1.1.10.8","1.1.2","1.1.2-M1","1.1.2-RC1","1.1.2-RC2","1.1.2-RC3","1.1.2.1","1.1.2.2","1.1.2.3","1.1.2.4","1.1.2.5","1.1.2.6","1.1.3-M1","1.1.3-M2","1.1.4","1.1.4-M1","1.1.4-M2","1.1.4-M3","1.1.7","1.1.7.1","1.1.7.2","1.1.7.3","1.1.7.4","1.1.7.5","1.1.7.6","1.1.7.7","1.1.7.8","1.1.8","1.1.8.1","1.1.8.2","1.1.8.3","1.1.8.4","1.1.9.0","1.1.9.1"],"database_specific":{"last_known_affected_version_range":"\u003c= 1.1.10.8","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-q233-g92q-qxp6/GHSA-q233-g92q-qxp6.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}