PT-2026-37265 · Pypi · Rust-Openssl

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CVE-2026-42327

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Published

2026-05-05

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Updated

2026-07-28

CVSS v4.0

8.7

High

VectorAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Name of the Vulnerable Software and Affected Versions rust-openssl versions 0.9.7 through 0.10.78
Description The X509Ref::ocsp responders() function returns OCSP responder URLs from a certificate's AIA extension as OpensslString. The Deref<Target = str> implementation wraps raw bytes using str::from utf8 unchecked. Because OpenSSL does not enforce that the underlying IA5String is ASCII, a certificate containing non-UTF-8 bytes in its OCSP accessLocation can cause safe Rust code to construct a &str that violates the UTF-8 invariant, leading to undefined behavior.
Recommendations Update to version 0.10.79.

Exploit

Fix

RCE

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Weakness Enumeration

Related Identifiers

CVE-2026-42327
GHSA-XP3W-R5P5-63RR
OPENSUSE-SU-2026:11210-1
OPENSUSE-SU-2026:11222-1
OPENSUSE-SU-2026:11223-1
OPENSUSE-SU-2026:11224-1
OPENSUSE-SU-2026:11237-1
OPENSUSE-SU-2026:11255-1
OPENSUSE-SU-2026:11262-1
OPENSUSE-SU-2026:11274-1
OPENSUSE-SU-2026:11275-1
OPENSUSE-SU-2026:21274-1
OPENSUSE-SU-2026:21285-1
OPENSUSE-SU-2026:21292-1
OPENSUSE-SU-2026:21294-1
OPENSUSE-SU-2026:21386-1
OPENSUSE-SU-2026:21406-1
OPENSUSE-SU-2026:21464-1
SUSE-SU-2026:22554-1
SUSE-SU-2026:22583-1
SUSE-SU-2026:22589-1
SUSE-SU-2026:22593-1
SUSE-SU-2026:22615-1
SUSE-SU-2026:22622-1
SUSE-SU-2026:22624-1
SUSE-SU-2026:22787-1
SUSE-SU-2026:22801-1
SUSE-SU-2026:22827-1
SUSE-SU-2026:22841-1
SUSE-SU-2026:22895-1
SUSE-SU-2026:22898-1
SUSE-SU-2026:22917-1
SUSE-SU-2026:22921-1
SUSE-SU-2026:2807-1
SUSE-SU-2026:2825-1
SUSE-SU-2026:2826-1
SUSE-SU-2026:2831-1
SUSE-SU-2026:2832-1
SUSE-SU-2026:2975-1
SUSE-SU-2026:2976-1
SUSE-SU-2026:2977-1
SUSE-SU-2026:3022-1
SUSE-SU-2026:3026-1
SUSE-SU-2026:3040-1
SUSE-SU-2026:3152-1

Affected Products

Rust-Openssl