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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 9
https://github.com/memcached/memcached/
cna@vuldb.com
https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63f…
cna@vuldb.com
https://github.com/memcached/memcached/releases/tag/1.6.44
cna@vuldb.com
https://protectiv.ph/research/memcached-asciiauth-empty-line-dos
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-90698
cna@vuldb.com
https://vuldb.com/submit/916217
cna@vuldb.com
https://vuldb.com/submit/916219
cna@vuldb.com
https://vuldb.com/vuln/403231
cna@vuldb.com
https://vuldb.com/vuln/403231/cti
cna@vuldb.com