PHP-Memcached v2.2.0 and below contains an improper NULL termination which allows attackers to execute CLRF injection.

published 2022-04-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-31189

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 21.4%; EPSS 21.4% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

PHP-Memcached v2.2.0 and below contains an improper NULL termination which allows attackers to execute CLRF injection. Note: Third parties have disputed this as not affecting PHP-Memcached directly.

Patch / fix

distros 1

memcached CBL-Mariner 2.0 1.6.22-1

azure linux advisories AZL-9342

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-05-22)

Exploit prediction

21.44% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

xhzeem.me https://xhzeem.me/posts/Php5-memcached-Injection-Bypass/read/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

References

xhzeem.me /posts/Php5-memcached-Injection-Bypass/read/
exploit, third-party-advisory
github.com /php-memcached-dev/php-memcached/issues/519

Sources

CVE List CVE-2022-26635
NVD CVE-2022-26635

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary