Improper input validation in Rustcrypto Elliptic-Curves
CVE-2026-22700
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 public-key encryption (PKE) implementation: the decrypt() path performs unchecked slice::split_at operations on input buffers derived from untrusted ciphertext. An attacker can submit short/undersized ciphertext or carefully-crafted DER-encoded structures to trigger bounds-check panics (Rust unwinding) which crash the calling thread or process. This issue has been patched via commit e60e991.
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: 0.003 (20.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · 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
Frequently asked questions
- What is CVE-2026-22700?
- CVE-2026-22700 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-2026-22700?
- High severity. CVSS v3 base score is 7.5 out of 10.