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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (34.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
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
- github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-78p6-6878-8mj6 (Exploit, Vendor Advisory)
- github.com/RustCrypto/elliptic-curves/pull/1602 (Patch, Issue Tracking)
- github.com/RustCrypto/elliptic-curves/commit/085b7bee647029bd189e13752034182050… (Patch)
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.