Kubernetes ingress-nginx up to 1.12.4/1.13.0 input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Kubernetes ingress-nginx up to 1.12.4/1.13.0. The impacted element is an unknown function. The manipulation results in input validation. This vulnerability is cataloged as CVE-2025-15566. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Kubernetes ingress-nginx up to 1.12.4/1.13.0. Affected is an unknown functionality. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-proxy-set-headers` Ingress annotation can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)

The weakness was shared by Jan-otto Kröpke as 136789. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-15566 since 02/06/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.12.5 or 1.13.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0330). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source Kubernetes

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (kubernetes): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: ingress-nginx 1.12.5/1.13.1

Timelineinfo

02/06/2026 Advisory disclosed
02/06/2026 +0 days CVE reserved
02/06/2026 +0 days VulDB entry created
02/06/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 136789
Researcher: Jan-otto Kröpke
Status: Confirmed

CVE: CVE-2025-15566 (🔒)
GCVE (CVE): GCVE-0-2025-15566
GCVE (VulDB): GCVE-100-344604
CERT Bund: WID-SEC-2026-0330 - Kubernetes (ingress-nginx): Schwachstelle ermöglicht Codeausführung und Offenlegung von Informationen

Entryinfo

Created: 02/06/2026 07:11
Updated: 02/06/2026 12:02
Changes: 02/06/2026 07:11 (65), 02/06/2026 12:02 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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