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Yaml Libyaml CVE-2025-40908

| EUVD-2025-16577 CRITICAL
Files or Directories Accessible to External Parties (CWE-552)
2025-06-01 9b29abf9-4ab0-4765-b253-1875cd9b441e
Information Disclosure Path Traversal Yaml Libyaml Red Hat Suse
Critical
Disputed · 9.1 NVD
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Severity by source

Sources disagree (Medium–Critical)
NVD PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Ubuntu
MEDIUM
qualitative
SUSE
CRITICAL
qualitative
Red Hat
7.7 HIGH
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

5
EUVD ID Assigned
Mar 14, 2026 - 16:42 euvd
EUVD-2025-16577
Analysis Generated
Mar 14, 2026 - 16:42 vuln.today
Patch released
Mar 14, 2026 - 16:42 nvd
Patch available
PoC Detected
Jul 02, 2025 - 15:43 vuln.today
Public exploit code
CVE Published
Jun 01, 2025 - 14:15 nvd
CRITICAL 9.1

DescriptionCVE.org

YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

AnalysisAI

File modification via 2-args open in YAML-LibYAML before 0.903.0 for Perl. PoC and patch available.

Technical ContextAI

CWE-552 via two-argument open().

RemediationAI

Update.

Vendor StatusVendor

Ubuntu

Priority: Medium
libyaml-libyaml-perl
Release Status Version
xenial needs-triage -
bionic needs-triage -
focal needs-triage -
plucky not-affected 0.903.0+ds-1
upstream released 0.903.0+ds-1
oracular ignored end of life
jammy released 0.83+ds-1ubuntu0.22.04.1
noble released 0.89+ds-1ubuntu0.24.04.1
questing not-affected -
USN-7632-1

Debian

libyaml-libyaml-perl
Release Status Fixed Version Urgency
bullseye vulnerable 0.82+repack-1 -
bookworm fixed 0.86+ds-1+deb12u1 -
trixie fixed 0.903.0+ds-1 -
forky, sid fixed 0.904.0+ds-1 -
(unstable) fixed 0.903.0+ds-1 -

SUSE

Severity: Critical
Product Status
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6 Fixed
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Development Tools 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Fixed

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CVE-2025-40908 vulnerability details – vuln.today
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