[AutoPR- Security] Patch expat for CVE-2026-32778, CVE-2026-32777, CVE-2026-32776 [MEDIUM]

[azurelinux-security]

Auto Patch expat for CVE-2026-32778, CVE-2026-32777, CVE-2026-32776.

Autosec pipeline run -> https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1072727&view=results

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?

• Auto Patch expat for CVE-2026-32778 (LOW), CVE-2026-32777 (LOW), CVE-2026-32776 (MEDIUM).

Change Log

• CVE-2026-32778
• CVE-2026-32777
• CVE-2026-32776

Does this affect the toolchain?

YES/NO

Associated issues

• N/A

Links to CVEs

• https://nvd.nist.gov/vuln/detail/CVE-2026-32778
• https://nvd.nist.gov/vuln/detail/CVE-2026-32777
• https://nvd.nist.gov/vuln/detail/CVE-2026-32776

Test Methodology

• Pipeline build id: Buddy Build URL

[v-aaditya]

CVE-2026-32776 (MEDIUM) -

• The expat version on AzureLinux 2.0 is 2.6.4 and is in the range of affected versions, which are < 2.7.5.
• Upstream patch reference is present in patch header.
• The AI patch completely matches with the upstream patch.

CVE-2026-32777 (LOW) -

• The expat version on AzureLinux 2.0 is 2.6.4 and is in the range of affected versions, which are < 2.7.5.
• Upstream patch reference is present in patch header.
• The AI patch matches with the upstream patch except the changes related to adding a test case in file tests/misc_tests.c are not included although the file is present in our source code.

CVE-2026-32778 (LOW) -

• The expat version on AzureLinux 2.0 is 2.6.4 and is in the range of affected versions, which are < 2.7.5.
• Upstream patch reference is present in patch header.
• The AI patch completely matches with the upstream patch.

[v-aaditya]

Buddy Build has been triggered - https://dev.azure.com/mariner-org/mariner/_build/results?buildId=1090185&view=results

[Kanishk-Bansal]

Buddy Build

[v-aaditya]

Buddy Build

Buddy Build has passed !

[Kanishk-Bansal]

Patch Analysis (all patches matches upstream)

• Buddy Build 
• patch applied during the build (check rpm.log)
• patch include an upstream reference
• PR has security tag