CVE-2022-26635

Exp

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.

Published: 2022-04-05 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-26635 is rated High Exploit Risk (93.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 21.68%, 97th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +13.50% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-26635

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-26635

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 8.19% 21.68% +13.50%
2 2026-01-26 23.39% 8.19% -15.20%
3 2026-01-25 — 23.39% —

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-26635

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2022-26635

OS Trackers for CVE-2022-26635

vendor priority summary link
alpine — CVE-2022-26635: 1 source package rows (memcached); 18 state rows across 5 repos (3.12-main, 3.17-main, 3.18-main, 3.19-main, edge-main); fixed 17, open 1. https://security.alpinelinux.org/vuln/CVE-2022-26635
suse medium CVE-2022-26635 severity moderate: SUSE including 3 source package names (php7-memcached, php72-memcached, php74-memcached), 3 product×package rows across 1 product lines (SUSE Linux Enterprise Module for Web and Scripting 12): Known Not Affected 3. https://www.suse.com/security/cve/CVE-2022-26635/
ubuntu medium CVE-2022-26635 medium priority: Ubuntu including 1 source packages (php-memcached), 9 status rows across 9 suites (bionic, focal, impish, jammy, kinetic, lunar, trusty, upstream, xenial): not-affected 7, ignored 2. https://ubuntu.com/security/CVE-2022-26635

Affected software / configurations for CVE-2022-26635

Vendor Product Version Raw CPE
php memcached <= 2.2.0 cpe:2.3:a:php:memcached:*:*:*:*:*:*:*:*

References for CVE-2022-26635

cvelogic Threat Intelligence