CVE-2006-3017

9.3 HIGH 4% exploit odds Fix listed Other Web app

What it is

zend_hash_del_key_or_index in zend_hash.c in PHP before 4.4.3 and 5.x before 5.1.3 can cause zend_hash_del to delete the wrong element, which prevents a variable from being unset even when the PHP unset function is called, which might cause the variable's value to be used in security-relevant operations.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 4.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2006-06-14 23:02 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:26 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 4.1% in the next 30 days (EPSS).
Severity: 9.3 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2006-06-14 23:02 UTC
Last modified: 2026-06-16 22:26 UTC
Exploit probability: 4.1% · EPSS, next 30 days
Record status: Modified

Affected

PHP ≤ 4.4.2
PHP 3.0
PHP 3.0.1
PHP 3.0.2
PHP 3.0.3
PHP 3.0.4
PHP 3.0.5
PHP 3.0.6

Attack profile CVSS 2.0 · 9.3

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: Complete
Integrity: Complete
Availability: Complete

Raw vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record