Bump github.com/tektoncd/chains from 0.26.0 to 0.26.2

[dependabot]

Bumps github.com/tektoncd/chains from 0.26.0 to 0.26.2.

Release notes

Sourced from github.com/tektoncd/chains's releases.

Tekton Chains release v0.26.2

-Docs @ v0.26.2 -Examples @ v0.26.2

Installation one-liner

kubectl apply -f https://infra.tekton.dev/tekton-releases/chains/previous/v0.26.2/release.yaml

Attestation

The Rekor UUID for this release is 108e9186e8c5677a7e46855402bd228281747a3ed323026c284c56ac1b8a546aaf0ce6f32e6714bd

Obtain the attestation:

REKOR_UUID=108e9186e8c5677a7e46855402bd228281747a3ed323026c284c56ac1b8a546aaf0ce6f32e6714bd
rekor-cli get --uuid $REKOR_UUID --format json | jq -r .Attestation | jq .

Verify that all container images in the attestation are in the release file:

RELEASE_FILE=https://infra.tekton.dev/tekton-releases/chains/previous/v0.26.2/release.yaml
REKOR_UUID=108e9186e8c5677a7e46855402bd228281747a3ed323026c284c56ac1b8a546aaf0ce6f32e6714bd
Obtains the list of images with sha from the attestation
REKOR_ATTESTATION_IMAGES=$(rekor-cli get --uuid "$REKOR_UUID" --format json | jq -r .Attestation | jq -r '.subject[]|.name + ":v0.26.2@sha256:" + .digest.sha256')
Download the release file
curl -L "$RELEASE_FILE" > release.yaml
For each image in the attestation, match it to the release file
for image in $REKOR_ATTESTATION_IMAGES; do
printf $image; grep -q $image release.yaml && echo " ===> ok" || echo " ===> no match";
done

Changes

... (truncated)

Commits

• bee7519 chore(deps): fix stale deps (#1547)
• 6cad4e5 fix: upgrade cosign 2.6.0 to 2.6.2 (#1537)
• 2548d11 Revert "fix: updated cosign version to address cve-2025-66506" (#1523)
• 2018d81 fix: updated cosign version to address cve-2025-66506
• See full diff in compare view

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[vdemeester]

/lgtm

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