Is there a public exploit for CVE-2026-62337?

No public exploit for CVE-2026-62337 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-62337?

CVE-2026-62337 scores CVSS 6.9 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.3%.

What does CVE-2026-62337 affect?

CVE-2026-62337 affects axiom-crypto snark-verifier.

6.9 Medium

SNARK Verifier is a generic (S)NARK verifier.

CVE-2026-62337

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::multiscalarmultiplication places a Value::Assigned() base paired with Value::Constant(ONE) into its unscaled variable-base list and passes it directly to sumwithconst. 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.

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
EPSS: 0.3% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 2 November 2026
Affected: axiom-crypto · snark-verifier
Assigner: GitHub_M

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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