fix(deps): vuln minor: Flask, marshmallow · patch: pytest

[gh-worker-campaigns-3e9aa4]

Summary: Security update — 3 packages upgraded (MINOR changes included)

Manifests changed:

• . (poetry)

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✅ Action Required: Please review the changes below. If they look good, approve and merge this PR.

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Updates

Package	From	To	Type	Dep Type	Vulnerabilities Fixed
marshmallow	3.22.0	3.26.2	minor	Direct	2 MEDIUM
pytest	8.3.2	8.3.5	patch	Direct	2 MEDIUM
Flask	3.0.3	3.1.3	minor	Direct	2 LOW

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Security Details

ℹ️ Other Vulnerabilities (6)

Package	CVE	Severity	Summary	Unsafe Version	Fixed In
marshmallow	GHSA-428g-f7cq-pgp5	MODERATE	Marshmallow has DoS in Schema.load(many)	3.22.0	3.26.2
marshmallow	CVE-2025-68480	MODERATE	Marshmallow has DoS in Schema.load(many)	3.22.0	-
pytest	GHSA-6w46-j5rx-g56g	MODERATE	pytest has vulnerable tmpdir handling	8.3.2	9.0.3
pytest	CVE-2025-71176	MODERATE	-	8.3.2	-
Flask	GHSA-68rp-wp8r-4726	LOW	Flask session does not add Vary: Cookie header when accessed in some ways	3.0.3	3.1.3
Flask	CVE-2026-27205	LOW	Flask session does not add Vary: Cookie header when accessed in some ways	3.0.3	-

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Review Checklist

Standard review:

• Review changes for compatibility with your code
• Check for breaking changes in release notes
• Run tests locally or wait for CI
• Approve and merge this PR

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Update Mode: all_vulns

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[dd-prapprover]

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🛠️ PRApproval Status

• ✅ PR is eligible for auto-approval by rule dependency-management-version-updater - 2026-06-16T23:28:24Z
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