CVE-2026-93561
MEDIUMDescription
A flaw was found in io.netty/netty-codec-memcache. The Memcache binary protocol codec incorrectly reads `keyLength` and `extrasLength` as signed Java types instead of unsigned, as specified by the protocol. A malicious Memcache server can exploit this type mismatch by sending a specially crafted response. This can lead to frame desynchronization and response smuggling, where one client's data may be inadvertently exposed to another client's response stream in proxy or cache environments.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 21% of all known CVEs.
References
Related Vulnerabilities
Other CWE-1035 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2026-93558 | High | 7.5 | 1.1% | - | - |
| CVE-2026-93564 | High | 7.5 | 0.9% | - | - |
| CVE-2026-93579 | Medium | 6.5 | 0.9% | - | - |
| CVE-2026-93565 | High | 7.5 | 0.8% | - | - |
| CVE-2026-93566 | Medium | 6.5 | 0.5% | - | - |
| CVE-2026-93562 | Medium | 6.5 | 0.4% | - | - |
Common questions
How do I fix CVE-2026-93561?
No published fix for CVE-2026-93561 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-93561 being actively exploited?
Not that we know of. CVE-2026-93561 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.29% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.
How severe is CVE-2026-93561?
CVE-2026-93561 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-25.