HOMEVULNERABILITIESCVE-2026-40161
MEDIUM

CVE-2026-40161

CWE-201Published: April 21, 2026· Updated: Apr 24, 2026

6.5
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:8.3th

Official Description

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. From 1.0.0 to 1.10.0, the Tekton Pipelines git resolver in API mode sends the system-configured Git API token to a user-controlled serverURL when the user omits the token parameter. A tenant with TaskRun or PipelineRun create permission can exfiltrate the shared API token (GitHub PAT, GitLab token, etc.) by pointing serverURL to an attacker-controlled endpoint.

NVD Source

Technical Analysis

CVE-2026-40161 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

linuxfoundation1 product
tekton pipelines
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff

All References (3)

→
https://github.com/tektoncd/pipeline/issues/9608Issue Tracking
→
https://github.com/tektoncd/pipeline/issues/9609Issue Tracking
→
https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpffVendor Advisory

Quick Facts

CVE IDCVE-2026-40161
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-201
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedApr 21, 2026

Related CVEs (CWE-201)

CVE-2026-39912
9.1
CVE-2025-11500
8.7
CVE-2026-5483
8.5
CVE-2026-54848
8.3
CVE-2026-46481
8.3
CVE-2026-32829
8.2

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-40161 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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