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CVE-2026-86469

Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path

5.3 Medium

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
Low

Exploit likelihood

0.14%Unchanged since Sep 8, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
CVE-2026-86469
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Weakness
CWE-59
Updated
2026-11-06
EUVDEUVD-2026-72488 5.3

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
EUVD-2026-72488
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Updated
2026-11-06
GitHub AdvisoriesGHSA-847x-vxjh-whpv 5.3

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION...

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
GHSA-847x-vxjh-whpv
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Weakness
CWE-59
Updated
2026-11-02
NVD 5.3

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
CVE-2026-86469
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Weakness
CWE-59
Updated
2026-11-06
OSVDEBIAN-CVE-2026-86469 5.3

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
DEBIAN-CVE-2026-86469
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Updated
2026-11-03
OSVUBUNTU-CVE-2026-86469 5.3

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
UBUNTU-CVE-2026-86469
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Updated
2026-11-04
OSVAZL-99993 No score

CVE-2026-86469 affecting package glib 2.78.6-11

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Record
AZL-99993
Updated
2026-11-05

Affected products

Affected packages

Affected packages
PackageAffectedFixed
glib
Azure Linux:3
 through 2.78.6-11 None known
glib2.0
Debian:12
 All versions, plus listed versions
2.74.6-22.74.6-2+deb12u12.74.6-2+deb12u22.74.6-2+deb12u32.74.6-2+deb12u4
Show 45 moreShow less
2.74.6-2+deb12u52.74.6-2+deb12u62.74.6-2+deb12u72.74.6-2+deb12u82.74.6-2+deb12u92.75.0-12.75.2-12.75.3-12.75.3-22.75.3-32.75.4-12.76.0-12.76.1-12.76.2-12.76.3-12.76.4-12.76.4-22.76.4-32.76.4-42.77.0-12.77.1-12.77.1-22.77.2-12.77.3-12.78.0-12.78.0-22.78.1-12.78.1-22.78.1-32.78.1-42.78.2-12.78.3-12.78.3-22.78.4-12.78.4-22.78.4-2.12.78.4-32.78.4-42.78.4-52.78.4-62.78.4-72.79.0+git20240110~g38f5ba3c-12.79.0+git20240110~g38f5ba3c-22.79.0+git20240119~62ee8bf6-12.79.1-1
 None known
glib2.0
Debian:13
 All versions, plus listed versions
2.84.3-12.84.4-12.84.4-22.84.4-32.84.4-3~deb13u1
Show 45 moreShow less
2.84.4-3~deb13u22.84.4-3~deb13u32.84.4-3~deb13u42.84.4-3~deb13u52.85.1-12.85.1-22.85.2-22.85.3-12.85.4-12.86.0-12.86.0-22.86.0-32.86.0-42.86.0-52.86.0-62.86.0-72.86.1-12.86.1-22.86.2-12.86.3-12.86.3-22.86.3-32.86.3-42.86.3-52.87.1-12.87.2-12.87.2-22.87.2-32.87.3-12.87.3~gitlab0-12.87.5-12.88.0-12.88.1-22.88.2-12.88.3-12.88.3-22.88.3-32.89.2-12.89.3-12.89.3-22.89.3-32.89.3-42.89.3-52.89.4-22.90.0-1
 None known
glib2.0
Debian:14
 All versions, plus listed versions
2.84.3-12.84.4-12.84.4-22.84.4-32.84.4-3~deb13u1
Show 45 moreShow less
2.84.4-3~deb13u22.84.4-3~deb13u32.84.4-3~deb13u42.84.4-3~deb13u52.85.1-12.85.1-22.85.2-22.85.3-12.85.4-12.86.0-12.86.0-22.86.0-32.86.0-42.86.0-52.86.0-62.86.0-72.86.1-12.86.1-22.86.2-12.86.3-12.86.3-22.86.3-32.86.3-42.86.3-52.87.1-12.87.2-12.87.2-22.87.2-32.87.3-12.87.3~gitlab0-12.87.5-12.88.0-12.88.1-22.88.2-12.88.3-12.88.3-22.88.3-32.89.2-12.89.3-12.89.3-22.89.3-32.89.3-42.89.3-52.89.4-22.90.0-1
 None known
glib2.0
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
2.38.0-1ubuntu12.38.1-12.39.1-0ubuntu12.39.1-0ubuntu22.39.1-0ubuntu3
Show 20 moreShow less
2.39.2-0ubuntu12.39.2-0ubuntu22.39.3-0ubuntu42.39.4-0ubuntu12.39.90-0ubuntu12.39.91-0ubuntu22.39.91-0ubuntu32.39.92-22.40.0-12.40.0-1ubuntu12.40.0-22.40.2-0ubuntu12.40.2-0ubuntu1.12.40.2-0ubuntu1.1+esm12.40.2-0ubuntu1.1+esm22.40.2-0ubuntu1.1+esm32.40.2-0ubuntu1.1+esm42.40.2-0ubuntu1.1+esm62.40.2-0ubuntu1.1+esm72.40.2-0ubuntu1.1+esm8
 None known
glib2.0
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
2.46.1-12.46.1-22.47.1-12.47.3-32.47.4-1
Show 21 moreShow less
2.47.5-12.47.6-12.48.0-1ubuntu32.48.0-1ubuntu42.48.1-1~ubuntu16.04.12.48.2-0ubuntu12.48.2-0ubuntu32.48.2-0ubuntu42.48.2-0ubuntu4.12.48.2-0ubuntu4.22.48.2-0ubuntu4.32.48.2-0ubuntu4.42.48.2-0ubuntu4.52.48.2-0ubuntu4.62.48.2-0ubuntu4.72.48.2-0ubuntu4.82.48.2-0ubuntu4.8+esm12.48.2-0ubuntu4.8+esm32.48.2-0ubuntu4.8+esm42.48.2-0ubuntu4.8+esm52.48.2-0ubuntu4.8+esm6
 None known
glib2.0
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
2.54.1-1ubuntu12.55.2-2ubuntu12.56.0-2ubuntu12.56.0-4ubuntu12.56.1-2ubuntu1
Show 15 moreShow less
2.56.2-0ubuntu0.18.04.12.56.2-0ubuntu0.18.04.22.56.3-0ubuntu0.18.04.12.56.4-0ubuntu0.18.04.22.56.4-0ubuntu0.18.04.32.56.4-0ubuntu0.18.04.42.56.4-0ubuntu0.18.04.52.56.4-0ubuntu0.18.04.62.56.4-0ubuntu0.18.04.72.56.4-0ubuntu0.18.04.82.56.4-0ubuntu0.18.04.92.56.4-0ubuntu0.18.04.9+esm32.56.4-0ubuntu0.18.04.9+esm42.56.4-0ubuntu0.18.04.9+esm52.56.4-0ubuntu0.18.04.9+esm6
 None known
glib2.0
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
2.62.1-12.63.1-22.63.1-2ubuntu12.63.3-12.63.3-3
Show 15 moreShow less
2.63.5-22.64.0-12.64.1-12.64.2-1~fakesync12.64.3-1~ubuntu20.04.12.64.6-1~ubuntu20.04.12.64.6-1~ubuntu20.04.22.64.6-1~ubuntu20.04.32.64.6-1~ubuntu20.04.42.64.6-1~ubuntu20.04.62.64.6-1~ubuntu20.04.72.64.6-1~ubuntu20.04.82.64.6-1~ubuntu20.04.92.64.6-1~ubuntu20.04.9+esm12.64.6-1~ubuntu20.04.9+esm2
 None known
glib2.0
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.68.4-1ubuntu12.70.1-12.70.2-12.71.0-22.71.1-1
Show 16 moreShow less
2.71.2-12.71.3-12.72.0-12.72.1-12.72.4-0ubuntu12.72.4-0ubuntu22.72.4-0ubuntu2.22.72.4-0ubuntu2.32.72.4-0ubuntu2.42.72.4-0ubuntu2.52.72.4-0ubuntu2.62.72.4-0ubuntu2.72.72.4-0ubuntu2.82.72.4-0ubuntu2.92.72.4-0ubuntu2.102.72.4-0ubuntu2.11
 None known
glib2.0
Ubuntu:24.04:LTS
 All versions, plus listed versions
2.78.0-22.78.1-42.78.3-12.78.3-22.79.1-1
Show 13 moreShow less
2.79.2-1~ubuntu12.79.3-3ubuntu52.80.0-6ubuntu12.80.0-6ubuntu32.80.0-6ubuntu3.12.80.0-6ubuntu3.22.80.0-6ubuntu3.42.80.0-6ubuntu3.52.80.0-6ubuntu3.62.80.0-6ubuntu3.72.80.0-6ubuntu3.82.80.0-6ubuntu3.92.80.0-6ubuntu3.10
 None known
glib2.0
Ubuntu:26.10
 All versions, plus listed versions
2.88.0-12.88.1-22.89.2-12.89.3-32.89.3-42.90.0-1
 None known
glib2.0
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.86.0-22.86.1-12.86.1-22.86.2-12.86.3-1
Show 6 moreShow less
2.86.3-42.87.2-22.87.2-32.87.3-12.88.0-12.88.0-1ubuntu0.1
 None known

History

History
RecordedChangedSources
productsCVE List, EUVD, NVD, OSV
affected, factsOSV
affectedOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-86469 is a medium vulnerability (CVSS 5.3) in Red Hat Enterprise Linux 10, published September 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. No source names a fixed version.

References

This page doesn't list everything

Left out here: 100 versions. The JSON record has them.

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