Low [CVE-2026-87063] tkn CLI installed from network without checksum or signature verification
This low-severity Red Hat Linux advisory covers CVE-2026-87063.
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Summary
A flaw was found in konflux-operator-tasks. The Continuous Integration (CI) process installs the `tkn` command-line interface (CLI) from a network download without verifying its integrity through checksums or digital signatures.
This vulnerability could allow a compromised distribution channel to substitute a malicious binary, potentially leading to the execution of unauthorized code within the CI environment. This flaw has a Low impact as it requires a compromised distribution channel to substitute a malicious binary during the installation of the `tkn` CLI.
In Red Hat Konflux CI environments, the `tkn` CLI is installed from a network download without checksum or signature verification, increasing the risk of supply chain attacks if the distribution channel is compromised. Red Hat severity: Low — CVSS 2.6 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N).
Weakness: CWE-494.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 59 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 59 minutes ago·verify at source
Mitigation checklist
- To mitigate this issue, ensure that the `tkn` CLI is installed with proper checksum and signature verification within your CI pipelines. This can be achieved by downloading the published `checksums.txt` for the `tkn` CLI release and verifying it with `sha256sum -c`. Additionally, verify the sigstore signature using `cosign verify-blob`. Alternatively, configure your CI setup to use a SHA-pinned action for `tkn` CLI installations. This requires modifying existing CI pipeline configurations.
Official advisory · high-confidence parse· fetched 59 minutes ago·verify at source
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