CVE-2026-40938Public exploitNetwork attack vector

Authenticated code execution via git revision injection

Published Apr 21, 2026 · Updated Apr 21, 2026

Argument injection in affected Tekton Pipelines releases before 1.11.1 allows remote authenticated users to execute code on the resolver pod. The Git resolver passes an unvalidated revision beginning with a hyphen to git fetch, which interprets it as an upload-pack option. Exploitation requires permission to submit ResolutionRequest objects and a valid local repository path; successful code execution can read cluster-wide Secrets.

CVSS severity7.5
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Argument injection in affected Tekton Pipelines releases before 1.11.1 allows remote authenticated users to execute code on the resolver pod. The Git resolver passes an unvalidated revision beginning with a hyphen to git fetch, which interprets it as an upload-pack option. Exploitation requires permission to submit ResolutionRequest objects and a valid local repository path; successful code execution can read cluster-wide Secrets.

The record

CVE
CVE-2026-40938
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
Tekton
Product
Tekton Pipelines
Classifications
CWE-88, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.0.0, < 1.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tekton · Tekton Pipelinesversion=>= 1.0.0, < 1.11.1

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5Red HatCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
8.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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