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Medium severity · published Sep 14, 2026
CVE-2026-90698
memcached mcmc Tokenizer proto_text.c try_read_command_asciiauth out-of-bounds
5.3
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
memcached · Memcached
1.6.41; 1.6.42; 1.6.43 · source: vendor
Affected product
ME
memcached
Memcached
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90698
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90698
github.com
https://github.com/memcached/memcached/
github.com
https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4
github.com
https://github.com/memcached/memcached/releases/tag/1.6.44
protectiv.ph
https://protectiv.ph/research/memcached-asciiauth-empty-line-dos
vuldb.com
https://vuldb.com/cve/CVE-2026-90698
vuldb.com
https://vuldb.com/submit/916217
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