Improper input validation in Rustcrypto Elliptic-Curves
CVE-2026-22699
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.004 (30.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Rustcrypto Elliptic-curves — versions = 0.14.0-pre.0, = 0.14.0-rc.0
- Rustcrypto Sm2_elliptic_curve — versions 0.14.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-22699?
- CVE-2026-22699 is a high-severity vulnerability in Rustcrypto Elliptic-Curves, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-01-10.
- How severe is CVE-2026-22699?
- High severity. CVSS v3 base score is 7.5 out of 10.