[MEDIUM] Upgrade python-virtualenv to 20.36.1 for CVE-2026-22702

[archana25-ms]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

---

Summary

What does the PR accomplish, why was it needed?
Upgrade python-virtualenv to 20.36.1 for CVE-2026-22702

Change Log

• modified: ../SPECS/python-virtualenv/0001-replace-to-flit.patch
• renamed: ../SPECS/python-virtualenv/CVE-2025-50181v1.patch -> ../SPECS/python-virtualenv/CVE-2025-50181.patch
• deleted: ../SPECS/python-virtualenv/CVE-2025-50181v0.patch
• deleted: ../SPECS/python-virtualenv/CVE-2025-50181v2.patch
• deleted: ../SPECS/python-virtualenv/CVE-2025-50181v3.patch
• modified: ../SPECS/python-virtualenv/python-virtualenv.signatures.json
• modified: ../SPECS/python-virtualenv/python-virtualenv.spec
• modified: ../cgmanifest.json

Does this affect the toolchain?

NO

Links to CVEs

• https://nvd.nist.gov/vuln/detail/CVE-2026-22702

Test Methodology

• Pipeline build id: xxxx
  Build and Test is successful

[Kanishk-Bansal]

Build

[archana25-ms]

Build

Buddy Build successful

[kgodara912]

Same as 3.0, #15507 (comment), there may be breaking changes.

[Kanishk-Bansal]

I feel there is no breaking changes according to changelogs. Co-pilot also suggested no breaking changes.
Hence, we can move ahead with the upgrade.

[kgodara912]

Version upgrade to python-virtualenv. Buddy build is successful. The removed cve patches are not needed. LGTM.