CVE-2026-56208: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-mgv2-4j37-m3x6
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CVSS 7.6
CWE-122
Published
Advisory Summary

CVE-2026-56208 is a HIGH (CVSS 7.6) security vulnerability vulnerability (CWE-122: Heap-based Buffer Overflow) affecting Software libraries in the Maven ecosystem. The weakness occurs when a heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().. Remediation is available in the latest vendor maintenance releases.

CVE-2026-56208 at a Glance

CVE Identifier CVE-2026-56208
GHSA Identifier GHSA-mgv2-4j37-m3x6
Severity HIGH
CVSS v3.1 Base Score 7.6
CWE Classification CWE-122: Heap-based Buffer Overflow
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability High (A:H)

How to Fix CVE-2026-56208

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-56208, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-122: Heap-based Buffer Overflow, where a heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

References

access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69934
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69933
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69932
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69931
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69930
access.redhat.com/errata/rhsa-2026:75... WEB
https://access.redhat.com/errata/RHSA-2026:75652
access.redhat.com/errata/rhsa-2026:75... WEB
https://access.redhat.com/errata/RHSA-2026:75654
access.redhat.com/errata/rhsa-2026:75... WEB
https://access.redhat.com/errata/RHSA-2026:75657
access.redhat.com/errata/rhsa-2026:75... WEB
https://access.redhat.com/errata/RHSA-2026:75658
access.redhat.com/errata/rhsa-2026:75... WEB
https://access.redhat.com/errata/RHSA-2026:75659
access.redhat.com/errata/rhsa-2026:75... WEB
https://access.redhat.com/errata/RHSA-2026:75660
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76041
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76042
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76043
access.redhat.com/errata/rhsa-2026:84... WEB
https://access.redhat.com/errata/RHSA-2026:84734
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-56208
aomedia.googlesource.com/aom/+/243f8ae84b WEB
https://aomedia.googlesource.com/aom/+/243f8ae84b
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2490799
issues.chromium.org/issues/504317456 WEB
https://issues.chromium.org/issues/504317456
Software Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56208.json
access.redhat.com/errata/rhsa-2026:30... WEB
https://access.redhat.com/errata/RHSA-2026:30814
access.redhat.com/errata/rhsa-2026:42... WEB
https://access.redhat.com/errata/RHSA-2026:42875
access.redhat.com/errata/rhsa-2026:47... WEB
https://access.redhat.com/errata/RHSA-2026:47104
access.redhat.com/errata/rhsa-2026:47... WEB
https://access.redhat.com/errata/RHSA-2026:47105
access.redhat.com/errata/rhsa-2026:51... WEB
https://access.redhat.com/errata/RHSA-2026:51100
access.redhat.com/errata/rhsa-2026:51... WEB
https://access.redhat.com/errata/RHSA-2026:51146
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54180
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54181
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54182
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54185
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54248
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54249
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54259
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54339
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60520
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61627
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61628
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61629
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68634
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68637
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68638
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68639
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68640
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68696
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68697
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68698
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68699
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68708
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68709
access.redhat.com/errata/rhsa-2026:68... WEB
https://access.redhat.com/errata/RHSA-2026:68710
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69927
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69929
NVD — CVE-2026-56208 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56208
access.redhat.com/errata/rhsa-2026:74... WEB
https://access.redhat.com/errata/RHSA-2026:74771
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71401
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71399
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71398
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71397
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71396
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71395
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71394
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71393
access.redhat.com/errata/rhsa-2026:71... WEB
https://access.redhat.com/errata/RHSA-2026:71392
access.redhat.com/errata/rhsa-2026:69... WEB
https://access.redhat.com/errata/RHSA-2026:69935

Frequently Asked Questions

What is CVE-2026-56208?
CVE-2026-56208 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-122: Heap-based Buffer Overflow.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-56208?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-56208?
CVE-2026-56208 has a CVSS v3.1 base score of 7.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H.
What CWE is associated with CVE-2026-56208?
CVE-2026-56208 is classified under CWE-122: Heap-based Buffer Overflow (A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().).
How can I check Maven dependencies for CVE-2026-56208?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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