{"id":"CVE-2026-62337","aliases":[],"cve":{"records":[{"id":"CVE-2026-62337","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-07-13T21:42:50.094Z","published":"2026-10-30T20:00:55.328Z","modified":"2026-10-30T20:00:55.328Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-30T20:00:55.328Z"}],"references":[{"url":"https://github.com/axiom-crypto/snark-verifier/security/advisories/GHSA-x26x-7f4v-cqx7","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/axiom-crypto/halo2-lib/commit/f53be0939e2accf0dd7672b1a4abe80af73dadf3","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/axiom-crypto/snark-verifier/commit/bbfcc721d714bea0d44a27c8fc6c4736e73ca853","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/axiom-crypto/snark-verifier/releases/tag/v0.2.5","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-20","description":"CWE-20: Improper Input Validation","source":"GitHub_M"}],"applicability":[],"prioritization":[]},"title":"SNARK Verifier: Halo 2 aggregation mishandles point-at-infinity proof elements","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"SNARK Verifier is a generic (S)NARK verifier. Prior to 0.2.5, the Halo 2 aggregation circuit can mishandle proof points encoded as the point at infinity. `EcPointLoader::multi_scalar_multiplication` places a `Value::Assigned(_)` base paired with `Value::Constant(ONE)` into its unscaled variable-base list and passes it directly to `sum_with_const`. The default shim delegates to halo2-lib `EccChip::sum`, whose incomplete affine addition assumes nonidentity input points. A prover-controlled proof point encoded as `(0, 0)` can therefore enter the final aggregation sum through the scalar-one shortcut and affect the MSM or accumulator computation. Practical exploitability depends on the surrounding aggregation and final-decider checks; the advisory does not establish universal acceptance of invalid proofs. This issue is fixed in version 0.2.5.","score":6.9,"severity":"medium","published":"2026-10-30T20:00:55.328Z","modified":"2026-10-30T20:00:55.328Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"axiom-crypto","name":"snark-verifier","platforms":[],"versions":[{"version":"< 0.2.5","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-62337"}],"remediation":[],"references":["https://github.com/axiom-crypto/snark-verifier/security/advisories/GHSA-x26x-7f4v-cqx7","https://github.com/axiom-crypto/halo2-lib/commit/f53be0939e2accf0dd7672b1a4abe80af73dadf3","https://github.com/axiom-crypto/snark-verifier/commit/bbfcc721d714bea0d44a27c8fc6c4736e73ca853","https://github.com/axiom-crypto/snark-verifier/releases/tag/v0.2.5"],"sources":[{"name":"CVE","id":"CVE-2026-62337","modified":"2026-10-30T20:00:55.328Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-62337"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9}],"sourceAffected":[],"observedAt":"2026-10-30T20:23:03.072Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T11:45:31.793Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T21:10:38.162Z","attemptedAt":"2026-10-30T21:10:38.162Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T21:10:37.328Z","attemptedAt":"2026-10-30T21:10:37.328Z"},{"source":"EUVD","status":"refresh-failed","attemptedAt":"2026-10-30T21:10:35.881Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T21:10:36.821Z","attemptedAt":"2026-10-30T21:10:36.821Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-62337","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62337","modified":"2026-10-30T20:17:12.780","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-10-30T21:10:38.162Z"}],"aiSummary":null}