CVE-2026-41186
Unauthenticated Go pprof exposure in Calico debug server
Description
When Calico's shared debug server is enabled (disabled by default), the Calico kube-controllers and Goldmane components bind their Go pprof debug listener to 0.0.0.0 without authentication. Any pod with network reachability to the listener can retrieve the process heap, goroutine stacks (including function arguments), and command-line arguments. Depending on the process's in-memory state, the heap may contain sensitive material. The debug listener is opt-in but is unsafe when enabled because it offers no authentication and no safe localhost-only binding option.
INFO
Published Date :
July 30, 2026, 3:16 p.m.
Last Modified :
Aug. 8, 2026, 1:20 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-41186
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | e6d453f4-3dae-4941-bcea-9af25f4e824d | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Disable the shared debug server when not needed.
- Restrict network access to the debug listener.
- Configure the debug listener for localhost binding only.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41186.
| URL | Resource |
|---|---|
| https://github.com/projectcalico/calico/pull/12491 | Issue Tracking Patch |
| https://github.com/projectcalico/calico/pull/12633 | Issue Tracking Patch |
| https://github.com/projectcalico/calico/pull/12634 | Issue Tracking Patch |
| https://www.tigera.io/security-bulletins/tta-2026-004/ | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41186 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41186
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41186 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41186 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:* versions up to (excluding) 3.21.7 *cpe:2.3:a:tigera:calico:*:*:*:*:open_source:*:*:* versions up to (excluding) 3.31.6 *cpe:2.3:a:tigera:calico:*:*:*:*:open_source:*:*:* versions from (including) 3.32.0 up to (excluding) 3.32.1 *cpe:2.3:a:tigera:calico:*:*:*:*:cloud:*:*:* versions up to (including) 22.4.0 *cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:* versions from (including) 3.22.0 up to (excluding) 3.22.4 Added Reference Type Tigera, Inc.: https://github.com/projectcalico/calico/pull/12491 Types: Issue Tracking, Patch Added Reference Type Tigera, Inc.: https://github.com/projectcalico/calico/pull/12633 Types: Issue Tracking, Patch Added Reference Type Tigera, Inc.: https://github.com/projectcalico/calico/pull/12634 Types: Issue Tracking, Patch Added Reference Type Tigera, Inc.: https://www.tigera.io/security-bulletins/tta-2026-004/ Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 30, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41186', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-30T16:10:46.313327Z'} -
New CVE Received by [email protected]
Jul. 30, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Tigera', 'product': 'Calico', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '3.31.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.32.0', 'lessThan': '3.32.1', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Tigera', 'product': 'Calico Enterprise', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '3.21.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '3.22.0', 'lessThan': '3.22.4', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Tigera', 'product': 'Calico Cloud', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '22.4.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description When Calico's shared debug server is enabled (disabled by default), the Calico kube-controllers and Goldmane components bind their Go pprof debug listener to 0.0.0.0 without authentication. Any pod with network reachability to the listener can retrieve the process heap, goroutine stacks (including function arguments), and command-line arguments. Depending on the process's in-memory state, the heap may contain sensitive material. The debug listener is opt-in but is unsafe when enabled because it offers no authentication and no safe localhost-only binding option. Added CVSS V4.0 AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-200 Added CWE CWE-489 Added Reference https://github.com/projectcalico/calico/pull/12491 Added Reference https://github.com/projectcalico/calico/pull/12633 Added Reference https://github.com/projectcalico/calico/pull/12634 Added Reference https://www.tigera.io/security-bulletins/tta-2026-004/