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CVE-2026-32829

7.5 · HIGH

lz4_flex is a pure Rust implementation of LZ4 compression/decompression.

Published Mar 20, 2026CWE-201EPSS 0.72%

Overview

CVE-2026-32829 is a high-severity vulnerability. It was published on March 20, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

lz4_flex is a pure Rust implementation of LZ4 compression/decompression. In versions 0.11.5 and below, and 0.12.0, decompressing invalid LZ4 data can leak sensitive information from uninitialized memory or from previous decompression operations. The library fails to properly validate offset values during LZ4 "match copy operations," allowing out-of-bounds reads from the output buffer. The block-based API functions (`decompress_into`, `decompress_into_with_dict`, and others when `safe-decode` is disabled) are affected, while all frame APIs are unaffected. The impact is potential exposure of sensitive data and secrets through crafted or malformed LZ4 input. This issue has been fixed in versions 0.11.6 and 0.12.1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/PSeitz/lz4_flex/commit/055502ee5d297ecd6bf448ac91c055c7f6df9b6dGitHubgithub.com/PSeitz/lz4_flex/security/advisories/GHSA-vvp9-7p8x-rfvvRefrustsec.org/advisories/RUSTSEC-2026-0041.htmlRefaccess.redhat.com/errata/RHSA-2026:11800Refaccess.redhat.com/errata/RHSA-2026:16354Refaccess.redhat.com/errata/RHSA-2026:19712Refaccess.redhat.com/errata/RHSA-2026:22862Refaccess.redhat.com/security/cve/CVE-2026-32829Refbugzilla.redhat.com/show_bug.cgi?id=2448271Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32829.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-32829?

CVE-2026-32829 is a high-severity vulnerability. It was published on March 20, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-32829?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-32829?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-32829?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-32829 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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