CVE-2006-3018

Unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unknown impact and attack vectors related to heap corruption.

Published: 2006-06-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-3018 is rated Moderate Risk (58/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.97%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2006-3018

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 1.19% 1.97% +0.78%
2 2025-03-30 1.70% 1.19% -0.51%
3 2025-03-29 — 1.70% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-3018

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
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-2006-3018

OS Trackers for CVE-2006-3018

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2006-3018
ubuntu medium CVE-2006-3018 medium priority: Ubuntu including 1 source packages (php5), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): not-affected 2, needs-triage 1, released 1. https://ubuntu.com/security/CVE-2006-3018

Vendor comments (NVD) for CVE-2006-3018

  • Red Hat (2006-09-20T00:00:00)

    Unknown: CVE-2006-3018 has been assigned to an issue in PHP where the cause and fix are unknown, and the impact cannot be verified. The source of the CVE assignment was a single line statement in the PHP 5.1.3 release announcement, http://www.php.net/release_5_1_3.php, reading: "Fixed a heap corruption inside the session extension." Of the changes made to the session extension between releases 5.1.2 and 5.1.3, none would fix a bug matching this description by our analysis.

Affected software / configurations for CVE-2006-3018

Vendor Product Version Raw CPE
php_group php <= 5.1.2 cpe:2.3:a:php_group:php:*:*:*:*:*:*:*:*

References for CVE-2006-3018

cvelogic Threat Intelligence