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Apptainer CVE-2025-65105

| EUVDEUVD-2025-200292 MEDIUM
UNIX Symbolic Link (Symlink) Following (CWE-61)
2025-12-02 security-advisories@github.com GHSA-j3rw-fx6g-q46j
Information Disclosure Debian Red Hat Apptainer Lfprojects
5.3
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-61
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling UNIX symlink resolution
Impact

CVSS 4.5. EPSS 0.0%. Vendor patch available.
Exploit ScenarioDerived

An attacker could send a specially crafted request to Apptainer to execute arbitrary code on the underlying server, potentially gaining full control of the system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

A remote code execution vulnerability in Apptainer (CVSS 4.5). Remediation should follow standard vulnerability management procedures. Vendor patch is available.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 14:04 CVSS 4.5

Apptainer is an open source container platform. In Apptainer versions less than 1.4.5, a container can disable two of the forms of the little used --security option, in particular the forms --security

RemediationAI

Apply the vendor-supplied patch immediately.

Affected VersionsENISA

apptainer < 1.4.5

Affected Packages

go github.com/apptainer/apptainer fix: 1.4.5
euvd apptainer fix: 1.4.5

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in go, euvd

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Technical ContextAI · show details

Vulnerability type: remote code execution. Affects Apptainer.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Ubuntu MEDIUM
SUSE 4.5 MEDIUM
AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Red Hat 5.3 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

3
CVSS changed
Oct 18, 2026 - 18:22 NVD
4.5 (MEDIUM) 5.3 (MEDIUM)
Patch released
Mar 15, 2026 - 14:04 nvd
Patch available
CVE Published
Dec 02, 2025 - 18:15 nvd
MEDIUM 4.5

DescriptionNVD

Apptainer is an open source container platform. In Apptainer versions less than 1.4.5, a container can disable two of the forms of the little used --security option, in particular the forms --security=apparmor:<profile> and --security=selinux:<label> which otherwise put restrictions on operations that containers can do. The --security option has always been mentioned in Apptainer documentation as being a feature for the root user, although these forms do also work for unprivileged users on systems where the corresponding feature is enabled. Apparmor is enabled by default on Debian-based distributions and SElinux is enabled by default on RHEL-based distributions, but on SUSE it depends on the distribution version. This vulnerability is fixed in 1.4.5.

Executive ViewAI

Why It Matters

Organizations using Apptainer should be aware of moderate risk from CVE-2025-65105 rated CVSS 4.5. Exploitation could compromise the security of affected deployments. A patch is available and should be applied during regular vulnerability management.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 95% exploitable
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vendor GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Low

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

More in Apptainer

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CVE-2023-30549 HIGH
7.8 Apr 25

Apptainer is an open source container platform for Linux. Rated high severity (CVSS 7.8), this vulnerability is low atta
CVE-2023-38496 LOW
3.3 Jul 25

Apptainer is an open source container platform. Rated low severity (CVSS 3.3), this vulnerability is no authentication r

Same weakness CWE-61 – UNIX Symbolic Link (Symlink) Following

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Same technique Information Disclosure

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CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
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CVE-2017-5638 CRITICAL POC
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CVE-2025-24813 CRITICAL POC
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CVE-2025-68613 HIGH POC
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CVE-2015-1701 HIGH POC
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CVE-2017-0147 HIGH POC
7.5

Vendor StatusVendor

Ubuntu

Priority: Medium
apptainer
Release Status Version
jammy DNE -
noble DNE -
plucky DNE -
questing needs-triage -
upstream needs-triage -

Debian

Bug #1121844
apptainer
Release Status Fixed Version Urgency
forky fixed 1.4.5-1 -
sid fixed 1.4.5-2 -
(unstable) fixed 1.4.5-1 -

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for HPC 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP6-LTSS Fixed
openSUSE Leap 15.6 Fixed
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed

References

Advisories & patches
PATCH https://github.com/apptainer/apptainer/commit/4313b42717e18a4add7dd7503528bc15af905981 PATCH https://github.com/apptainer/apptainer/commit/82f17900a0c31bc769bf9b4612d271c7068d8bf2 PATCH https://github.com/apptainer/apptainer/security/advisories/GHSA-j3rw-fx6g-q46j ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-65105 ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0439/ REF https://github.com/apptainer/apptainer/pull/3226 REF https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm REF https://github.com/sylabs/singularity/security/advisories/GHSA-wwrx-w7c9-rf87

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