Buffer Over-read Vulnerability in rust-openssl by Rust
CVE-2026-41677

1.7LOW

Key Information:

Vendor

Rust-OpenSSL

Status
Rust-OpenSSL
Vendor
CVE Published:
24 April 2026

What is CVE-2026-41677?

A security flaw exists in the rust-openssl library, specifically affecting versions from 0.9.0 up to, but not including, 0.10.78. The issue arises from the *_from_pem_callback APIs, which fail to properly validate the length returned by a user's callback function. This negligence can lead to scenarios where the password callback returns a value that exceeds the allocated buffer size, resulting in potential over-read vulnerabilities. It is important to note that OpenSSL 3.x is immune to this vulnerability. The issue has been addressed in the updated version 0.10.78.

Affected Version(s)

rust-openssl >= 0.9.0, < 0.10.78

References

https://github.com/rust-openssl/rust-openssl/security/adv...
x_refsource_CONFIRM

CVSS V4

Score:
1.7
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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