{"id":"CVE-2023-42460","state":"PUBLISHED","title":"_abi_decode input not validated in complex expressions in Vyper","description":"Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.","publishedAt":"2023-09-26T18:47:09.721Z","updatedAt":"2024-09-24T13:45:05.798Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["vyperlang vyper"],"affected":[{"vendor":"vyperlang","product":"vyper","versions":[{"version":">= 0.3.4, < 0.3.10","status":"affected"}]}],"references":["https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97","https://github.com/vyperlang/vyper/pull/3626"],"weaknesses":["CWE-682"],"ingestedAt":"2026-10-29T20:06:17.512Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/42xxx/CVE-2023-42460.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-42460","state":"PUBLISHED","datePublished":"2023-09-26T18:47:09.721Z","dateUpdated":"2024-09-24T13:45:05.798Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2023-09-08T20:57:45.574Z"},"containers":{"cna":{"title":"_abi_decode input not validated in complex expressions in Vyper","descriptions":[{"lang":"en","value":"Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626."}],"affected":[{"vendor":"vyperlang","product":"vyper","versions":[{"version":">= 0.3.4, < 0.3.10","status":"affected"}]}],"references":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97","name":"https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/vyperlang/vyper/pull/3626","name":"https://github.com/vyperlang/vyper/pull/3626","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-682","lang":"en","description":"CWE-682: Incorrect Calculation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2023-09-26T18:47:09.721Z"},"source":{"advisory":"GHSA-cx2q-hfxr-rj97","discovery":"UNKNOWN"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97","name":"https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/vyperlang/vyper/pull/3626","name":"https://github.com/vyperlang/vyper/pull/3626","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T19:23:38.895Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-24T13:20:49.007393Z","id":"CVE-2023-42460","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-24T13:45:05.798Z"}}]}}}