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CVE-2025-47281

Kyverno's Improper JMESPath Variable Evaluation Leads to Denial of Service

Published: Jul 23, 2025Updated: Aug 5, 2025 Sources: CVE List NVD GHSACWE-20
7.7HIGH
NVD MITRE
EPSS Score
0.5%
Top 59.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Kyverno is a policy engine designed for cloud native platform engineering teams. In versions 1.14.1 and below, a Denial of Service (DoS) vulnerability exists due to improper handling of JMESPath variable substitutions. Attackers with permissions to create or update Kyverno policies can craft expressions using the {{@}} variable combined with a pipe and an invalid JMESPath function (e.g., {{@ | non_existent_function }}). This leads to a nil value being substituted into the policy structure. Subsequent processing by internal functions, specifically getValueAsStringMap, which expect string values, results in a panic due to a type assertion failure (interface {} is nil, not string). This crashes Kyverno worker threads in the admission controller and causes continuous crashes of the reports controller pod. This is fixed in version 1.14.2.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-20CWE-248

Affected Products

kyverno
oss-projectaka kyverno.io
kyvernoOn-prem
Cloud & SaaS / container-orchestration
Go
package-ecosystem
github.com/kyverno/kyverno
OSS Libraries

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/kyverno/kyverno/security/advisories/GHSA-r5p3-955p-5ggq
github.com
https://github.com/kyverno/kyverno/commit/cbd7d4ca24de1c55396fc3295e9fc3215832be7c
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-47281
nvd.nist.gov
and 1 more references View all →

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