Vulnerability · Published Jan 10, 2026 · Assigned by GitHub_M
CVE-2026-22699RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()
High 7.5
In plain English
A high-severity improper input validation in elliptic-curves from RustCrypto. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support, including types and traits for representing various elliptic curve forms, scalars, points, and public/secret keys composed thereof. In versions 0.14.0-pre.0 and 0.14.0-rc.0, a denial-of-service vulnerability exists in the SM2 PKE decryption path where an invalid elliptic-curve point (C1) is decoded and the resulting value is unwrapped without checking. Specifically, AffinePoint::from_encoded_point(&encoded_c1) may return a None/CtOption::None when the supplied coordinates are syntactically valid but do not lie on the SM2 curve. The calling code previously used .unwrap(), causing a panic when presented with such input. This issue has been patched via commit 085b7be.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RustCrypto | elliptic-curves | = 0.14.0-pre.0= 0.14.0-rc.0 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H