High severity · published Jul 17, 2026
CVE-2026-45784
rust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers
7.1
CVSS
0.1%
EPSS
No
On KEV
Description
rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.50 until 0.10.80, CipherCtxRef::cipher_update_inplace in openssl/src/cipher_ctx.rs incorrectly sized output buffers when used with AES key-wrap-with-padding ciphers EVP_aes_{128,192,256}_wrap_pad. For a non-multiple-of-8 input, OpenSSL writes up to 7 bytes past the end of the caller's buffer or Vec, producing attacker-controllable heap corruption when the plaintext length is attacker-influenced. This issue is fixed in version 0.10.80.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RU
rust-openssl · rust-openssl
>= 0.10.50, < 0.10.80 · source: vendor
OP
Openssl · Sfackler
0.10.50 before 0.10.80 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45784
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45784
Patch
https://github.com/rust-openssl/rust-openssl/commit/19eceb26f2404aae187e5444e65c404ebc1348a7
Issue Tracking
https://github.com/rust-openssl/rust-openssl/pull/2638
Product
https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.80
Vendor Advisory
https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-phqj-4mhp-q6mq
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