A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.

An update of the glib package has been released.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2c53d4d272 advisory.

    Backport fixes for CVE-2026-1484, CVE-2026-1485, CVE-2026-1489.

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 Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-607c3364fd advisory.

    Backport fixes for CVE-2026-1484, CVE-2026-1485, CVE-2026-1489.

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 Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8017-1 advisory.

    It was discovered that GLib incorrectly parsed large Base64 data. An attacker could use this issue to     cause GLib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-1484)

    It was discovered that GLib incorrectly parsed certain treemagic files. An attacker could use this issue     to cause GLib to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2026-1485)

    It was discovered that GLib incorrectly handled Unicode case conversion. An attacker could use this issue     to cause GLib to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2026-1489)

Tenable has extracted the preceding description block directly from the Ubuntu 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 SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:20221-1 advisory.

    - CVE-2026-1485: Fixed buffer underflow and out-of-bounds access due to integer wraparound in content type     parsing (bsc#1257354).
    - CVE-2026-1484: Fixed buffer underflow and out-of-bounds access due to miscalculated buffer boundaries in     the Base64 encoding routine (bsc#1257355).
    - CVE-2026-1489: Fixed undersized heap allocation followed by out-of-bounds access due to integer overflow     in Unicode case conversion (bsc#1257353).
    - CVE-2026-0988: Fixed a potential integer overflow in g_buffered_input_stream_peek (bsc#1257049).

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0373-1 advisory.

    - CVE-2026-1485: Fixed buffer underflow and out-of-bounds access due to integer wraparound in content type     parsing (bsc#1257354).
    - CVE-2026-1484: Fixed buffer underflow and out-of-bounds access due to miscalculated buffer boundaries in     the Base64 encoding routine (bsc#1257355).
    - CVE-2026-1489: Fixed undersized heap allocation followed by out-of-bounds access due to integer overflow     in Unicode case conversion (bsc#1257353).

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0372-1 advisory.

    - CVE-2026-1485: Fixed buffer underflow and out-of-bounds access due to integer wraparound in content type     parsing (bsc#1257354).
    - CVE-2026-1484: Fixed buffer underflow and out-of-bounds access due to miscalculated buffer boundaries in     the Base64 encoding routine (bsc#1257355).
    - CVE-2026-1489: Fixed undersized heap allocation followed by out-of-bounds access due to integer overflow     in Unicode case conversion (bsc#1257353).

Tenable has extracted the preceding description block directly from the SUSE 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 openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20150-1 advisory.

    - CVE-2026-1485: Fixed buffer underflow and out-of-bounds access due to integer wraparound in content type     parsing (bsc#1257354).
    - CVE-2026-1484: Fixed buffer underflow and out-of-bounds access due to miscalculated buffer boundaries in     the Base64 encoding routine (bsc#1257355).
    - CVE-2026-1489: Fixed undersized heap allocation followed by out-of-bounds access due to integer overflow     in Unicode case conversion (bsc#1257353).
    - CVE-2026-0988: Fixed a potential integer overflow in g_buffered_input_stream_peek (bsc#1257049).

Tenable has extracted the preceding description block directly from the SUSE 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in the GLib Base64 encoding routine when processing very large input data. Due to     incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries.
    This can cause memory writes outside the allocated buffer. Applications that process untrusted or     extremely large Base64 input using GLib may crash or behave unpredictably. (CVE-2026-1484)

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

ID	Name	Product	Family	Severity
299590	Photon OS 5.0: Glib PHSA-2026-5.0-0763	Nessus	PhotonOS Local Security Checks	medium
298314	Fedora 42 : mingw-glib2 (2026-2c53d4d272)	Nessus	Fedora Local Security Checks	low
298309	Fedora 43 : mingw-glib2 (2026-607c3364fd)	Nessus	Fedora Local Security Checks	low
298268	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : GLib vulnerabilities (USN-8017-1)	Nessus	Ubuntu Local Security Checks	low
298230	SUSE SLES16 Security Update : glib2 (SUSE-SU-2026:20221-1)	Nessus	SuSE Local Security Checks	low
297979	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : glib2 (SUSE-SU-2026:0373-1)	Nessus	SuSE Local Security Checks	low
297971	SUSE SLES12 Security Update : glib2 (SUSE-SU-2026:0372-1)	Nessus	SuSE Local Security Checks	low
297785	openSUSE 16 Security Update : glib2 (openSUSE-SU-2026:20150-1)	Nessus	SuSE Local Security Checks	low
296776	Linux Distros Unpatched Vulnerability : CVE-2026-1484	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-1484

high

Tenable Plugins

medium

low

low

low

low

low

low

low

medium