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    2 vulnerabilities found for rs-soroban-poseidon by stellar

    CVE-2026-32129 (GCVE-0-2026-32129)

    Vulnerability from nvd – Published: 2026-03-12 17:47 – Updated: 2026-03-13 16:23
    VLAI
    Title
    Poseidon V1 variable-length input collision via implicit zero-padding
    Summary
    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.
    Severity
    8.7 (High)
    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
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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                "id": "CVE-2026-32129",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
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        {
          "product": "rs-soroban-poseidon",
          "vendor": "stellar",
          "versions": [
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            }
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        }
      ],
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            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
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      },
      "title": "Poseidon V1 variable-length input collision via implicit zero-padding"
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-03-12T17:47:10.717Z",
    "dateReserved": "2026-03-10T22:19:36.545Z",
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    CVE-2026-32129 (GCVE-0-2026-32129)

    Vulnerability from cvelistv5 – Published: 2026-03-12 17:47 – Updated: 2026-03-13 16:23
    VLAI
    Title
    Poseidon V1 variable-length input collision via implicit zero-padding
    Summary
    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.
    Severity
    8.7 (High)
    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
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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