What’s Vulnerable › Vulnerabilities

CVE-2026-22699: RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-10 · updated 2026-06-17
• Weakness: CWE-20

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

• RustCrypto elliptic-curves: 0.14.0-pre0, 0.14.0-rc0

References

• https://github.com/RustCrypto/elliptic-curves/commit/085b7bee647029bd189e1375203418205006bcab
• https://github.com/RustCrypto/elliptic-curves/pull/1602
• https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-78p6-6878-8mj6
• https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-78p6-6878-8mj6

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