CVE-2026-42327
Published: May 14, 2026
Modified: May 15, 2026
Description
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.7 to before 0.10.79, X509Ref::ocsp_responders returns OCSP responder URLs from a certificate's AIA extension as OpensslString, whose Deref<Target = str> wraps the raw bytes with str::from_utf8_unchecked. OpenSSL does not enforce that the underlying IA5String is ASCII, so a certificate with non-UTF-8 bytes in its OCSP accessLocation causes safe Rust code to construct a &str that violates the UTF-8 invariant — resulting in undefined behavior. This vulnerability is fixed in 0.10.79.
| Vendor | Product | Versions |
|---|---|---|
rust-openssl | rust-openssl | affected >= 0.9.7, < 0.10.79 |
Weaknesses (CWE)
References
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