CVE-2026-90698memcached mcmc Tokenizer proto_text.c try_read_command_asciiauth out-of-bounds
Updated under an hour ago ()
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It affects n/a memcached. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-125, CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n/a memcached memcached:memcached | 1.6.41; 1.6.42; 1.6.43; 1.6.44 not affected | CNA record |
References
- https://vuldb.com/vuln/403231vdb-entry, technical-description
- https://vuldb.com/vuln/403231/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-90698third-party-advisory
- https://vuldb.com/submit/916217third-party-advisory
- https://vuldb.com/submit/916219third-party-advisory
- https://protectiv.ph/research/memcached-asciiauth-empty-line-dosexploit
- https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4patch
- https://github.com/memcached/memcached/releases/tag/1.6.44patch
- https://github.com/memcached/memcached/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.