CVE-2026-41187

What it is

Calico's apiserver wraps tier-scoped resources so that every operation runs through AuthorizeTierOperation, but the Delete override on NetworkPolicy, GlobalNetworkPolicy, and their staged variants is not invoked for DeleteCollection requests. A user holding the deletecollection verb or wildcard verbs on tier-scoped policy resources can bulk-delete policies in tiers they otherwise have no rights on, breaking the tier authorization boundary.

At a glance

Exploitability

Can be exploited over the network with an admin-level account. Limited direct impact.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-07-30 15:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-08-08 01:16 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 6.2 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-07-30 15:16 UTC

Last modified

2026-08-08 01:16 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-285

Record status

Analyzed

Affected

• Tigera Calico < 3.21.7
• Tigera Calico < 3.31.6
• Tigera Calico ≤ 22.4.0
• Tigera Calico < 3.22.4
• Tigera Calico < 3.32.1

Attack profile CVSS 4.0 · 6.2

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

High

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-41187.md and follow it. Check whether this project is affected by CVE-2026-41187. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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