CVE-2026-45784

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.

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-45784 on 2026-07-28. Shown when MITRE's text differs from the cvelistV5 mirror.

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: MEDIUM
CVSS score: 5.1 / 10
CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Effective score: 5.1 / 10 MEDIUM source: CNA overview
CWE(s): CWE-131, CWE-787
Reserved: 2026-05-13
Published: 2026-07-17 20:26 UTC
Last updated: 2026-07-20 13:49 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45784.json
Linked Threat: CVE-2026-45784 — CVE-2026-45784

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-45322
Assigner: GitHub_M
Published: Jul 17, 2026, 8:26:12 PM
Updated: Jul 20, 2026, 1:49:55 PM
EUVD base score (CVSS 4.0): 5.1 / 10
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
EUVD-reported EPSS: 0.1300
Vendors: rust-openssl
Products: rust-openssl (0.10.50, < 0.10.80)
Aliases: GHSA-phqj-4mhp-q6mq

ENISA 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.

EUVD references (4)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-07 03:01 UTC (source: CVRF).

MS severity: Moderate
Release: 2026-Jul

Affected products (1)

Vendor	Product	Versions	Platforms
rust-openssl	rust-openssl	`>= 0.10.50, < 0.10.80` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-phqj-4mhp-q6mq x_refsource_CONFIRM
https://github.com/rust-openssl/rust-openssl/pull/2638 x_refsource_MISC
https://github.com/rust-openssl/rust-openssl/commit/19eceb26f2404aae187e5444e65c404ebc1348a7 x_refsource_MISC
https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.80 x_refsource_MISC

MITRE references (4) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://github.com/rust-openssl/rust-openssl/commit/19eceb26f2404aae187e5444e65c404ebc1348a7 x_refsource_MISC
https://github.com/rust-openssl/rust-openssl/pull/2638 x_refsource_MISC
https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.80 x_refsource_MISC
https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-phqj-4mhp-q6mq x_refsource_CONFIRM

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

MSRC update guide: CVE-2026-45784 msrc
https://nvd.nist.gov/vuln/detail/CVE-2026-45784 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-45784 tenable:www.cve.org

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft Patch Tuesday for May 2026 — Snort rules and prominent ...

web:blog.talosintelligence.com

Microsoft has released its monthly security update for May 2026 , which includes 137 vulnerabilities affecting a range of products, including 16 that Microsoft marked as "critical".

2026-05-26 02:56 UTC
April 2026 Critical Patch Update Released | security - Oracle Blogs

web:blogs.oracle.com

For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-05-26 02:56 UTC
April 2026 Patch Tuesday | Critical Patches & Deployment Guide

web:layerlogix.com

April 2026 Patch Tuesday drops today. Here's what's critical, what to patch first, and how Houston IT teams should handle deployment — including the Secure Boot certificate deadline reminder.

2026-05-26 02:56 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-26 02:56 UTC
Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...

web:support.servicenow.com

Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

2026-05-26 02:56 UTC
CVE-2026-45784: OpenSSL Package Vulnerability Leading to Potential Heap ...

web:vulert.com

Learn about CVE-2026-45784 , a vulnerability in the OpenSSL package that can lead to heap corruption. Understand how to fix it and check if your application is affected using Vulert.

2026-05-26 02:56 UTC
Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days

web:www.bleepingcomputer.com

Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

2026-05-26 02:56 UTC
April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

2026-05-26 02:56 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-26 02:56 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-26 02:56 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-45784.json.

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