TI-2026-33521 Aliases CVE-2026-45784 GHSA-phqj-4mhp-q6mq

rust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers

LOW 22CWE-131Published 2026-07-17 · Updated 2026-07-20

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00134 2nd percentileScored 2026-11-07

Fix Fixed rust-openssl (rust-openssl): 0.10.80openssl (crates.io): 0.10.80

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
rust-openssl	rust-openssl	0.10.50 to before 0.10.80	0.10.80	Patch available	CNA
—	openssl (crates.io)	0.10.50 to before 0.10.80	0.10.80	Patch available	GHSA-phqj-4mhp-q6mq

rust-openssl Vendorrust-openssl Affected 0.10.50 to before 0.10.80 Fixed in 0.10.80 Patch available CNA
openssl (crates.io) Vendor— Affected 0.10.50 to before 0.10.80 Fixed in 0.10.80 Patch available GHSA-phqj-4mhp-q6mq

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sfackler:openssl::::::rust::*	0.10.50 to before 0.10.80	Vulnerable	sfackler

cpe:2.3:a:sfackler:openssl:*:*:*:*:*:rust:*:* Versions 0.10.50 to before 0.10.80 Vulnerable ·sfackler

Remediation

Fix · CNA rust-openssl (rust-openssl) Fixed in 0.10.80
Fix · GHSA-phqj-4mhp-q6mq openssl (crates.io) Fixed in 0.10.80 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-45784
2026-10-03 Alias added: GHSA-phqj-4mhp-q6mq

References

Patch 2

Advisory 1

https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-phqj-4mhp-q6mq

Other 2

TI-2018-14959 An issue was discovered in the openssl crate before 0.10.9 for Rust. CVSS 3.0CRITICAL 9.8
TI-2026-30633 rust-openssl: undefined behavior in X509Ref::ocsp_responders for certificates with non-UTF-8 OCSP URLs CVSS 4.0HIGH 8.7
TI-2026-30198 rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check CVSS 4.0HIGH 8.1
TI-2026-30193 rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1 CVSS 4.0HIGH 7.2
TI-2016-08969 An issue was discovered in the openssl crate before 0.9.0 for Rust. CVSS 3.0HIGH 8.1
TI-2026-30300 rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines… CVSS 4.0HIGH 8.3

See all 9 →

Sources

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