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::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.

• CWE-20

• 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
• https://github.com/axiom-crypto/snark-verifier/security/advisories/GHSA-x26x-7f4v-cqx7

Published

Oct 30, 2026

Last Modified

Oct 30, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-623279Router through version 0.4.41 contains an unauthenticated i…9.1
• CVE-2026-623289Router through version 0.4.41 contain an unauthenticated in…7.5
• CVE-2026-62331praktor is a multi-agent Claude Code orchestrator with Teleg…8.2
• CVE-2026-62333OpenVM is a performant and modular zkVM framework built for …8.7
• CVE-2026-62334OpenVM is a performant and modular zkVM framework built for …8.7
• CVE-2026-62335OpenVM is a performant and modular zkVM framework built for …6.9
• CVE-2026-62343ImageMagick is free and open-source software used for editin…4.7
• CVE-2026-62348TDengine is a time-series database optimized for Internet of…5.4
• CVE-2026-62349TDengine is an open source, time-series database optimized f…8.3
• CVE-2026-6235The Sendmachine for WordPress plugin for WordPress is vulner…9.8
• CVE-2026-62350TDengine is an open source, time-series database optimized f…7.2
• CVE-2026-62351TDengine is a time-series database optimized for Internet of…7.5