CVE-2026-22700Public exploitNetwork attack vector

Service crash via unchecked ciphertext slicing

Published Jan 10, 2026 · Updated Jan 10, 2026

Improper input validation in RustCrypto SM2 PKE 0.14.0-pre.0 and 0.14.0-rc.0 allows remote attackers to crash a calling service. The internal decrypt() function in sm2/src/pke/decrypting.rs calls slice::split_at with lengths derived from untrusted ciphertext without first checking buffer bounds. Any network-facing application that passes attacker-controlled ciphertext to the affected SM2 decryption APIs can suffer a thread or process crash.

CVSS severity7.5
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in RustCrypto SM2 PKE 0.14.0-pre.0 and 0.14.0-rc.0 allows remote attackers to crash a calling service. The internal decrypt() function in sm2/src/pke/decrypting.rs calls slice::split_at with lengths derived from untrusted ciphertext without first checking buffer bounds. Any network-facing application that passes attacker-controlled ciphertext to the affected SM2 decryption APIs can suffer a thread or process crash.

The record

CVE
CVE-2026-22700
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
RustCrypto
Product
elliptic-curves
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 0.14.0-pre.0
  2. Affected versionversion== 0.14.0-rc.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RustCrypto · elliptic-curvesversion== 0.14.0-pre.0; version== 0.14.0-rc.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo