Projectcapsule Capsule up to 0.13.6 Tenant Update Validation forbidden_annotations_regex.go regexp.MustCompile input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.40-

Summaryinfo

A vulnerability described as problematic has been identified in Projectcapsule Capsule up to 0.13.6. The affected element is the function regexp.MustCompile of the file internal/webhook/tenant/validation/forbidden_annotations_regex.go of the component Tenant Update Validation. The manipulation results in input validation. This vulnerability is reported as CVE-2026-61794. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Projectcapsule Capsule up to 0.13.6. Affected is the function regexp.MustCompile of the file internal/webhook/tenant/validation/forbidden_annotations_regex.go of the component Tenant Update Validation. 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 availability. CVE summarizes:

Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.7, the Tenant update validation in internal/webhook/tenant/validation/forbidden_annotations_regex.go compiles ForbiddenLabels.Regex for both the labels and annotations checks instead of validating ForbiddenAnnotations.Regex. An administrator who can update a Tenant can therefore persist a malformed ForbiddenAnnotations.Regex while leaving the labels expression valid. Namespace creation or update later passes the stored expression through pkg/api/forbidden_list.go, where regexp.MustCompile can panic during forbidden metadata validation and deny namespace operations for the affected tenant. This issue is fixed in version 0.13.7.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-61794 since 07/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 0.13.7 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.9
VulDB Temp Score: 4.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.8
CNA Vector (GitHub_M): 🔒

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
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: Capsule 0.13.7

Timelineinfo

07/10/2026 CVE reserved
09/18/2026 +70 days Advisory disclosed
09/18/2026 +0 days VulDB entry created
09/18/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-61794 (🔒)
GCVE (CVE): GCVE-0-2026-61794
GCVE (VulDB): GCVE-100-407622

Entryinfo

Created: 09/18/2026 18:49
Changes: 09/18/2026 18:49 (67)
Complete: 🔍
Cache ID: 216::103

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