CVE-2026-32129
- Source
- https://cve.org/CVERecord?id=CVE-2026-32129
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32129.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-32129
- Aliases
- Published
- 2026-03-12T17:47:10.717Z
- Modified
- 2026-04-02T13:25:07.757241Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Poseidon V1 variable-length input collision via implicit zero-padding
- Details
-
soroban-poseidon provides Poseidon and Poseidon2 cryptographic hash functions for Soroban smart contracts. Poseidon V1 (PoseidonSponge) accepts variable-length inputs without injective padding. When a caller provides fewer inputs than the sponge rate (inputs.len() < T - 1), unused rate positions are implicitly zero-filled. This allows trivial hash collisions: for any input vector [m1, ..., mk] hashed with a sponge of rate > k, hash([m1, ..., mk]) equals hash([m1, ..., mk, 0]) because both produce identical pre-permutation states. This affects any use of PoseidonSponge or poseidon_hash where the number of inputs is less than T - 1 (e.g., hashing 1 input with T=3). Poseidon2 (Poseidon2Sponge) is not affected.
- Database specific
{ "cwe_ids": [ "CWE-328" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32129.json", "cna_assigner": "GitHub_M" }- References
-
- https://github.com/stellar/rs-soroban-poseidon/releases/tag/v25.0.1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32129.json
- https://github.com/stellar/rs-soroban-poseidon/security/advisories/GHSA-g2p6-hh5v-7hfm
- https://nvd.nist.gov/vuln/detail/CVE-2026-32129
- https://github.com/stellar/rs-soroban-poseidon/pull/10