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CVE-2026-21895— rsa crate has potential panic on a prime being equal to 1

Quick assessment

Affected
RustCrypto RSA
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RSA是Rust Crypto开源的一个Rust库。 RSA 0.9.10之前版本存在安全漏洞，该漏洞源于创建RSA私钥时存在恐慌，可能导致错误处理不当。

AI Predicted 5.5 Difficulty: Easy EPSS 0.44% · P37

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-21895

Vulnerability Information
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Vulnerability Title
rsa crate has potential panic on a prime being equal to 1
Source: CVE Program / CVE List V5
Vulnerability Description
The `rsa` crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is `1`. Version 0.9.10 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
对异常条件检查或处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
RSA 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RSA是Rust Crypto开源的一个Rust库。 RSA 0.9.10之前版本存在安全漏洞，该漏洞源于创建RSA私钥时存在恐慌，可能导致错误处理不当。
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 RSA < 0.9.10 -

II. Public POCs for CVE-2026-21895

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III. Intelligence Information for CVE-2026-21895

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IV. Related Vulnerabilities

Same product: RSA
Same vendor: RustCrypto
Same weakness: CWE-703

V. Comments for CVE-2026-21895

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