CVE-2026-22700

Name: CVE-2026-22700
Creator: NVD / NIST
Published: 2026-01-10T06:15:52.517+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-22700 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

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 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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.28%

19.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions	Update
Rustcrypto	Sm2 Elliptic Curve	0.14.0	Pre0

References

https://github.com/RustCrypto/elliptic-curves/commit/e60e99167a9a2b187ebe80c994c5204b0fdaf4abPatch
https://github.com/RustCrypto/elliptic-curves/pull/1603Patch
https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-j9xq-69pf-pcm8Exploit, Vendor Advisory
https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-j9xq-69pf-pcm8Exploit, Vendor Advisory

Timeline

Published: Jan 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-22700?

How severe is CVE-2026-22700?

CVE-2026-22700 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-22700?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-22700?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST