CVE-2026-33022 [Medium] | Security Vulnerability in Tekton Pipelines

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Versions 0.60.0 through 1.0.0, 1.1.0 through 1.3.2, 1.4.0 through 1.6.0, 1.7.0 through 1.9.0, 1.10.0, and 1.10.1 have a denial-of-service vulnerability in that allows any user who can create a TaskRun or PipelineRun to crash the controller cluster-wide by setting .spec.taskRef.resolver (or .spec.pipelineRef.resolver) to a string of 31+ characters. The crash occurs because GenerateDeterministicNameFromSpec produces a name exceeding the 63-character DNS-1123 label limit, and its truncation logic panics on a [-1] slice bound since the generated name contains no spaces. Once crashed, the controller enters a CrashLoopBackOff on restart (as it re-reconciles the offending resource), blocking all CI/CD reconciliation until the resource is manually deleted. Built-in resolvers (git, cluster, bundles, hub) are unaffected due to their short names, but any custom resolver name triggers the bug. The fix truncates the resolver-name prefix instead of the full string, preserving the hash suffix for determinism and uniqueness. This issue has been patched in versions 1.0.1, 1.3.3, 1.6.1, 1.9.2 and 1.10.2.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-20	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-20

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.5

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

3.6

[email protected]

OS Trackers for CVE-2026-33022

vendor	priority	summary	link
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2026-33022
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2026-33022/

vendor

priority

summary

link

redhat

medium

—

https://access.redhat.com/security/cve/CVE-2026-33022

suse

medium

—

https://www.suse.com/security/cve/CVE-2026-33022/

Affected software / configurations for CVE-2026-33022

Vendor	Product	Version	Raw CPE
linuxfoundation	tekton_pipelines	>= 0.60.0, < 1.0.1	cpe:2.3:a:linuxfoundation:tekton_pipelines::::::go::*
linuxfoundation	tekton_pipelines	>= 1.1.0, < 1.3.3	cpe:2.3:a:linuxfoundation:tekton_pipelines::::::go::*
linuxfoundation	tekton_pipelines	>= 1.4.0, < 1.6.1	cpe:2.3:a:linuxfoundation:tekton_pipelines::::::go::*
linuxfoundation	tekton_pipelines	>= 1.7.0, < 1.9.2	cpe:2.3:a:linuxfoundation:tekton_pipelines::::::go::*
linuxfoundation	tekton_pipelines	>= 1.10.0, < 1.10.2	cpe:2.3:a:linuxfoundation:tekton_pipelines::::::go::*

References for CVE-2026-33022

URL	Tags
https://github.com/tektoncd/pipeline/commit/5eead3f859b9f938e86039e4d29185092c1d4ee6	Patch
https://github.com/tektoncd/pipeline/security/advisories/GHSA-cv4x-93xx-wgfj	Patch Vendor Advisory

URL

CVE-2026-33022 | Tekton Pipelines: Controller can panic when setting long resolver names in TaskRun/PipelineRun

Exploit prediction scoring system (EPSS) score for CVE-2026-33022

Common vulnerability scoring system (CVSS) metrics for CVE-2026-33022

Weakness enumeration for CVE-2026-33022

GitHub Security Advisory for CVE-2026-33022

OS Trackers for CVE-2026-33022

Affected software / configurations for CVE-2026-33022

References for CVE-2026-33022