# CVE-2026-22700: RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE

Source: https://junglewise.ai/threats/cve-2026-22700-rustcrypto-has-insufficient-length-validation-in-decrypt-in-sm2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-13  
License: CC BY 4.0 with a link back

CVE-2026-22700 · Severity: low · CVSS 3.1 · Published 2026-01-13

RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE

Technologies: [sm2 (crates.io)](https://junglewise.ai/threats/technologies/sm2). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io).

## Quick answers

**Is CVE-2026-22700 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-22700 being exploited in the wild.

**How severe is CVE-2026-22700?** Low severity, with a CVSS score of 3.1, published 13 January 2026.

**Which products and versions are affected?** sm2 (crates.io) SEMVER:introduced=0.14.0-pre.0,last_affected=0.14.0-rc.4.

**Is there a fix for CVE-2026-22700?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-22700?** Check whether you run sm2 (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- sm2 (crates.io) SEMVER:introduced=0.14.0-pre.0,last_affected=0.14.0-rc.4

## Identifiers

- CVE-2026-22700
- GHSA-j9xq-69pf-pcm8

## Related threats

- [SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()](https://junglewise.ai/threats/cve-2026-22699-sm2-pke-has-unchecked-affinepoint-decoding-unwrap-in-decrypt)
- [SM2-PKE has 32-bit Biased Nonce Vulnerability](https://junglewise.ai/threats/cve-2026-22698-sm2-pke-has-32-bit-biased-nonce-vulnerability)