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MEDIUM

CVE-2026-14355

CVSS v3

5.6

MEDIUM

EPSS Score

0.3 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

In PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, 8.5.* before 8.5.8, the AES-WRAP-PAD algorithm implementation in OpenSSL extension contains a buffer allocation flaw. The output buffer for the AES key-wrap-with-padding operation is sized from the plaintext length without accounting for RFC 5649 expansion. This may cause OpenSSL to write beyond allocated memory, corrupting heap metadata and triggering application abort.

Technical details

CVSS v3 Vector
3.1
Published
2026-07-03
Last Modified
2026-07-04

Frequently asked questions

What is CVE-2026-14355?

In PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, 8.5.* before 8.5.8, the AES-WRAP-PAD algorithm implementation in OpenSSL extension contains a buffer allocation flaw. The output buffer for the AES key-wrap-with-padding operation is sized from the plaintext length without accounting for RFC 5649 expansion. This may cause OpenSSL to write beyond allocated memory, corrupting heap metadata and triggering application abort.

Is CVE-2026-14355 actively exploited?

Active exploitation of CVE-2026-14355 has not been confirmed. The EPSS score is 0.3%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-14355?

CVE-2026-14355 has a CVSS v3 base score of 5.6 (MEDIUM severity), with vector string 3.1.

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