UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:3539-1 advisory.

    This update for python-ujson fixes the following issue:

    - CVE-2026-44660: memory leak in `ujson.dump()` on write failure can lead to DoS (bsc#1270301).

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

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

An update of the python3 package has been released.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21518-1 advisory.

    This update for python-ujson fixes the following issue:

    - CVE-2026-44660: failing to decrement a serialized JSON object during a write exception in ujson.dump()     can lead to       memory leaks (bsc#1270301).

Tenable has extracted the preceding description block directly from the SUSE 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.

  - UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to     5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the     serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the     full size of the serialized payload. This vulnerability is fixed in 5.12.1. (CVE-2026-44660)

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

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

  - UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to
    5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the
    serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the
    full size of the serialized payload. This vulnerability is fixed in 5.12.1. (CVE-2026-44660)

ID	Name	Product	Family	Type	Severity
334473	SUSE SLED15 / SLES15 Security Update : python-ujson (SUSE-SU-2026:3539-1)	Nessus	SuSE Local Security Checks	Local	high
334049	Photon OS 5.0: Python3 PHSA-2026-5.0-92-0882	Nessus	PhotonOS Local Security Checks	Local	high
332669	Photon OS 5.0: Python3 PHSA-2026-5.0-91-0882	Nessus	PhotonOS Local Security Checks	Local	high
332105	openSUSE 16 Security Update : python-ujson (openSUSE-SU-2026:21518-1)	Nessus	SuSE Local Security Checks	Local	high
325970	Photon OS 4.0: Python3 PHSA-2026-4.0-1053	Nessus	PhotonOS Local Security Checks	Local	high
321579	Photon OS 5.0: Python3 PHSA-2026-5.0-0882	Nessus	PhotonOS Local Security Checks	Local	high
318086	Linux Distros Unpatched Vulnerability : CVE-2026-44660	Nessus	Misc.	Local	high
441782	SCA: security update for ujson (GHSA-c38f-wx89-p2xg)	Tenable Cloud Security	SCA Checks	Local	high
441782	SCA: security update for ujson (GHSA-c38f-wx89-p2xg)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

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