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CVE-2026-22699— RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()

Quick assessment

Affected
RustCrypto elliptic-curves
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RustCrypto: Elliptic Curves是Rust Crypto开源的一个Rust加密库。 RustCrypto: Elliptic Curves 0.14.0-pre.0版本和0.14.0-rc.0版本存在输入验证错误漏洞，该漏洞源于SM2 PKE解密路径中未检查无效椭圆曲线点，可能导致拒绝服务。

CVSS 7.5 · High EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-22699

Vulnerability Information
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Vulnerability Title
RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()
Source: CVE Program / CVE List V5
Vulnerability 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 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
RustCrypto: Elliptic Curves 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RustCrypto: Elliptic Curves是Rust Crypto开源的一个Rust加密库。 RustCrypto: Elliptic Curves 0.14.0-pre.0版本和0.14.0-rc.0版本存在输入验证错误漏洞，该漏洞源于SM2 PKE解密路径中未检查无效椭圆曲线点，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
RustCrypto elliptic-curves = 0.14.0-pre.0 -

II. Public POCs for CVE-2026-22699

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9737 chars
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III. Intelligence Information for CVE-2026-22699

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Same Patch Batch · RustCrypto · 2026-01-10 · 4 CVEs total

CVE-2026-22700 7.5 HIGH RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE
CVE-2026-22705 6.4 MEDIUM RustCrypto: Signatures has timing side-channel in ML-DSA decomposition
CVE-2026-22698 RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability

IV. Related Vulnerabilities

Same product: elliptic-curves
Same vendor: RustCrypto
Same weakness: CWE-20

V. Comments for CVE-2026-22699

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