https://patchsiren.com/cves/libgit2/cve-2026-535872026-09-11 https://patchsiren.com/cves/libgit2/cve-2026-535832026-09-11 https://patchsiren.com/cves/libgit2/cve-2026-535842026-09-11 https://patchsiren.com/cves/libgit2/cve-2026-535852026-09-11