What is CVE-2023-44273?

CVE-2023-44273 is a critical-severity vulnerability in Consensys Gnark-Crypto, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2023-09-28.

How severe is CVE-2023-44273?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Consensys Gnark-Crypto

CVE-2023-44273

Consensys gnark-crypto through 0.11.2 allows Signature Malleability. This occurs because deserialisation of EdDSA and ECDSA signatures does not ensure that the data is in a certain interval.

Vulnerability class: Insecure Deserialization

Published 2023-09-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.011 · change: +0.002

Affected products

Consensys Gnark-Crypto

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

verichains.io (Product)
github.com/Consensys/gnark-crypto/releases (Release Notes)
github.com/Consensys/gnark-crypto/pull/449 (Patch)

Frequently asked questions

What is CVE-2023-44273?: CVE-2023-44273 is a critical-severity vulnerability in Consensys Gnark-Crypto, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2023-09-28.
How severe is CVE-2023-44273?: Critical severity. CVSS v3 base score is 9.8 out of 10.