CVE-2026-14355: ext/openssl: Memory corruption in openssl_encrypt with AES-WRAP-PAD

Published Jul 3, 2026
·
Updated

Fixed bug (Memory corruption (zendmmheap corrupted) in opensslencrypt with AES-WRAP-PAD). (CVE-2026-14355)

Other sources

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.

— MITRE

Affected Software

9 affected componentsFixes available
PHP PHP<8.4.23
8.4.23
PHP PHP>=8.2.0<8.2.32
PHP PHP>=8.3.0<8.3.32
PHP PHP>=8.4.0<8.4.23
PHP PHP>=8.5.0<8.5.8
Debian Debian Linux=12.0
debian/php7.4<=7.4.33-1+deb11u5, <=7.4.33-1+deb11u11
debian/php8.2
8.2.32-1~deb12u1
debian/php8.4
8.4.23-1~deb13u18.4.23-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 8.4.23
  2. Upgrade

    Upgrade debian/php8.2 to a version that resolves this vulnerability.

    Fixed in 8.2.32-1~deb12u1
  3. Upgrade

    Upgrade debian/php8.4 to a version that resolves this vulnerability.

    Fixed in 8.4.23-1~deb13u1Fixed in 8.4.23-1
  4. Upgrade

    Upgrade php/ext/openssl to a version that resolves this vulnerability.

    Fixed in 8.2.32
  5. Upgrade

    Upgrade php/ext/openssl to a version that resolves this vulnerability.

    Fixed in 8.3.32
  6. Upgrade

    Upgrade php/ext/openssl to a version that resolves this vulnerability.

    Fixed in 8.4.23
  7. Upgrade

    Upgrade php/ext/openssl to a version that resolves this vulnerability.

    Fixed in 8.5.8

Event History

Jul 3, 2026
CVE Published
via PHP·12:00 AM
Data Sourced
via PHP·12:00 AM
DescriptionAffected Software
CVE Published
via MITRE·08:57 PM
Data Sourced
via MITRE·08:57 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
Jul 20, 2026
Data Sourced
via Launchpad·06:10 PM
Description
Data Sourced
via Debian·06:10 PM
DescriptionAffected Software
Jul 21, 2026
Data Sourced
via Ubuntu·06:10 PM
RemedyDescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-14355?

The severity of CVE-2026-14355 is medium with a score of 5.6.

2

How do I fix CVE-2026-14355?

To fix CVE-2026-14355, upgrade your PHP version to 8.2.32, 8.3.32, 8.4.23, or 8.5.8 or later.

3

What systems are affected by CVE-2026-14355?

CVE-2026-14355 affects PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, and 8.5.* before 8.5.8.

4

What type of vulnerability is CVE-2026-14355?

CVE-2026-14355 is a memory corruption vulnerability in the openssl_encrypt function related to the AES-WRAP-PAD implementation.

5

What impact does CVE-2026-14355 have?

CVE-2026-14355 could lead to potential memory corruption, which may affect system stability and data integrity.

Company

Resources

Contact

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