CVE-2026-90698: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-xf89-37qr-gchh
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CVSS 5.3
CWE-119
Published
Advisory Summary

CVE-2026-90698 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. this may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-90698 at a Glance

CVE Identifier CVE-2026-90698
GHSA Identifier GHSA-xf89-37qr-gchh
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:N/S:U/C:N/I:N/A:L).

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

How to Fix CVE-2026-90698

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-2026-90698, 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, where the product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. this may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. 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 security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.

References

NVD — CVE-2026-90698 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90698
Security Fix Commit FIX COMMIT
https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4
Software Source Repository REPOSITORY
https://github.com/memcached/memcached
Software Release RELEASE
https://github.com/memcached/memcached/releases/tag/1.6.44
protectiv.ph/research/memcached-... WEB
https://protectiv.ph/research/memcached-asciiauth-empty-line-dos
vuldb.com/cve/cve-2026-90698 WEB
https://vuldb.com/cve/CVE-2026-90698
vuldb.com/submit/916217 WEB
https://vuldb.com/submit/916217
vuldb.com/submit/916219 WEB
https://vuldb.com/submit/916219
vuldb.com/vuln/403231 WEB
https://vuldb.com/vuln/403231
vuldb.com/vuln/403231/cti WEB
https://vuldb.com/vuln/403231/cti

Frequently Asked Questions

What is CVE-2026-90698?
CVE-2026-90698 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-90698?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-90698?
CVE-2026-90698 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-90698?
CVE-2026-90698 is classified under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer (The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.).
How can I check Maven dependencies for CVE-2026-90698?
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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  "schema_version" : "1.4.0",
  "id" : "GHSA-xf89-37qr-gchh",
  "modified" : "2026-09-14T09:31:03Z",
  "published" : "2026-09-14T09:31:03Z",
  "aliases" : [ "CVE-2026-90698" ],
  "details" : "A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.",
  "severity" : [ {
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  }, {
    "type" : "CVSS_V4",
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  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
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    "url" : "https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4"
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  }, {
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  }, {
    "type" : "WEB",
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    "type" : "WEB",
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  }, {
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    "url" : "https://vuldb.com/vuln/403231/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-14T09:17:02Z"
  }
}