Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup flushes through the write callback into freed memory, which can crash the process and may enable code execution. This issue is fixed in version 13.0.0.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the b9a3fd21-d2af-11f1-bae2-3497f65b111b advisory.

    The Pillow project published security advisories for issues fixed               in release 13.0.0.  They include an argument injection in the               Ghostscript call used for EPS images, heap buffer overflows in               several image decoders that can lead to code execution, and               infinite loops and unbounded memory use when opening crafted               image files.

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

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when
    libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-
    influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the
    error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup
    flushes through the write callback into freed memory, which can crash the process and may enable code
    execution. This issue is fixed in version 13.0.0. (CVE-2026-112396)

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

  - Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when     libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-     influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the     error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup     flushes through the write callback into freed memory, which can crash the process and may enable code     execution. This issue is fixed in version 13.0.0. (CVE-2026-112396)

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

ID	Name	Product	Family	Type	Severity
373482	FreeBSD : Pillow -- multiple vulnerabilities (b9a3fd21-d2af-11f1-bae2-3497f65b111b)	Nessus	FreeBSD Local Security Checks	Local	critical
476889	Chainguard: openstack-horizon-2025.2: security update to 25.5.2_git20260914-r12	Tenable Cloud Security	Chainguard Local Security Checks	Local	high
476889	Chainguard: openstack-horizon-2025.2: security update to 25.5.2_git20260914-r12	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	high
476601	SCA: security update for pillow (GHSA-4rr5-89j8-mwwm)	Tenable Cloud Security	SCA Checks	Local	high
476601	SCA: security update for pillow (GHSA-4rr5-89j8-mwwm)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
367434	Linux Distros Unpatched Vulnerability : CVE-2026-112396	Nessus	Misc.	Local	high

Detections

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CVE-2026-112396

high

Tenable Plugins

critical

high

high

high

high

high