# CVE-2026-90698: memcached: A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43

CVE-2026-90698 is fixed in memcached on 1 platform, first by memcached 1.6.40-1ubuntu0.3, released September 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-90698
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0086
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 14, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | memcached Debian 14 | 1.6.45-1 | [DEBIAN-CVE-2026-90698](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90698.md) | Sep 17, 2026 |
| Linux | memcached Ubuntu 22.04.1 LTS (jammy) | 1.6.14-1ubuntu0.3 | [memcached 1.6.14-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-memcached-1.6.14-1ubuntu0.3.md) | Sep 22, 2026 |
| Linux | memcached Ubuntu 24.04.5 LTS (noble) | 1.6.24-1ubuntu0.3 | [memcached 1.6.24-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-memcached-1.6.24-1ubuntu0.3.md) | Sep 22, 2026 |
| Linux | memcached Ubuntu 26.04.1 LTS (resolute) | 1.6.40-1ubuntu0.3 | [memcached 1.6.40-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-memcached-1.6.40-1ubuntu0.3.md) | Sep 14, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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