phpseclib is a PHP secure communications library. Projects using versions 1.0.26 and below, 2.0.0 through 2.0.51, and 3.0.0 through 3.0.49 are vulnerable to a to padding oracle timing attack when using AES in CBC mode. This issue has been fixed in versions 1.0.27, 2.0.52 and 3.0.50.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ca43aa006f advisory.

    33.0.1 release

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4518 advisory.

    - -----------------------------------------------------------------------     Debian LTS Advisory DLA-4518-1              debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Utkarsh Gupta     March 30, 2026                              https://wiki.debian.org/LTS
    - -----------------------------------------------------------------------

    Package        : phpseclib     Version        : 1.0.19-3+deb11u3     CVE ID         : CVE-2023-52892 CVE-2026-32935

    Two vulnerabilities were discovered in phpseclib, a PHP Secure     Communications Library.

    CVE-2023-52892

        Some characters in Subject Alternative Name fields in TLS         certificates were incorrectly allowed to have a special meaning         in regular expressions, leading to name confusion in X.509         certificate host verification.

    CVE-2026-32935

        The AES-CBC implementation was susceptible to a padding oracle         timing attack due to the use of a short-circuiting logical         operator in the unpadding function.

    For Debian 11 bullseye, these problems have been fixed in version     1.0.19-3+deb11u3.

    We recommend that you upgrade your phpseclib packages.

    For the detailed security status of phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/phpseclib

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-65fdd15133 advisory.

    Update to v3.0.50; contains fix for CVE-2026-32935

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-b7d9416ec4 advisory.

    Update to v3.0.50; contains fix for CVE-2026-32935

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6185 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6185-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 29, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : phpseclib     CVE ID         : CVE-2026-32935

    It was discovered that the AES-CBC implementation in the PHP Secure     Communications Library was susceptible to a padding oracle timing attack.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 1.0.20-1+deb12u3. This update also fixes CVE-2023-52892.

    For the stable distribution (trixie), these problems have been fixed in     version 1.0.23-6+deb13u1.

    We recommend that you upgrade your phpseclib packages.

    For the detailed security status of phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/phpseclib

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6186 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6186-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 29, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : php-phpseclib     CVE ID         : CVE-2026-32935

    It was discovered that the AES-CBC implementation in the PHP Secure     Communications Library was susceptible to a padding oracle timing attack.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 2.0.42-1+deb12u3. This update also fixes CVE-2023-52892.

    For the stable distribution (trixie), these problems have been fixed in     version 2.0.48-3+deb13u1.

    We recommend that you upgrade your php-phpseclib packages.

    For the detailed security status of php-phpseclib please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-phpseclib

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 / 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6187 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6187-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 29, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : php-phpseclib3     CVE ID         : CVE-2026-32935

    It was discovered that the AES-CBC implementation in the PHP Secure     Communications Library was susceptible to a padding oracle timing attack.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 3.0.19-1+deb12u4. This update also fixes CVE-2023-52892.

    For the stable distribution (trixie), these problems have been fixed in     version 3.0.43-2+deb13u1.

    We recommend that you upgrade your php-phpseclib3 packages.

    For the detailed security status of php-phpseclib3 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/php-phpseclib3

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-d1feefa819 advisory.

    Update to v2.0.52


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-bfeb46516b advisory.

    Update to v2.0.52


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - phpseclib is a PHP secure communications library. Projects using versions 1.0.26 and below, 2.0.0 through     2.0.51, and 3.0.0 through 3.0.49 are vulnerable to a to padding oracle timing attack when using AES in CBC     mode. This issue has been fixed in versions 1.0.27, 2.0.52 and 3.0.50. (CVE-2026-32935)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
305115	Fedora 42 : nextcloud (2026-ca43aa006f)	Nessus	Fedora Local Security Checks	high
304326	Debian dla-4518 : php-seclib - security update	Nessus	Debian Local Security Checks	high
304313	Fedora 42 : php-phpseclib3 (2026-65fdd15133)	Nessus	Fedora Local Security Checks	high
304261	Fedora 43 : php-phpseclib3 (2026-b7d9416ec4)	Nessus	Fedora Local Security Checks	high
304247	Debian dsa-6185 : php-seclib - security update	Nessus	Debian Local Security Checks	high
304246	Debian dsa-6186 : php-phpseclib - security update	Nessus	Debian Local Security Checks	high
304245	Debian dsa-6187 : php-phpseclib3 - security update	Nessus	Debian Local Security Checks	high
304039	Fedora 43 : php-phpseclib (2026-d1feefa819)	Nessus	Fedora Local Security Checks	high
304027	Fedora 42 : php-phpseclib (2026-bfeb46516b)	Nessus	Fedora Local Security Checks	high
303271	Linux Distros Unpatched Vulnerability : CVE-2026-32935	Nessus	Misc.	high

Detections

Analytics

CVE-2026-32935

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high