| id: GO-2026-4869 |
| modules: |
| - module: std |
| versions: |
| - fixed: 1.25.9 |
| - introduced: 1.26.0-0 |
| - fixed: 1.26.2 |
| vulnerable_at: 1.26.1 |
| packages: |
| - package: archive/tar |
| symbols: |
| - Reader.readOldGNUSparseMap |
| - readGNUSparseMap1x0 |
| derived_symbols: |
| - Reader.Next |
| summary: Unbounded allocation for old GNU sparse in archive/tar |
| description: |- |
| tar.Reader can allocate an unbounded amount of memory when reading a |
| maliciously-crafted archive containing a large number of sparse regions encoded |
| in the "old GNU sparse map" format. |
| credits: |
| - Colin Walters (walters@verbum.org) |
| - Uuganbayar Lkhamsuren (https://github.com/uug4na) |
| - Jakub Ciolek |
| references: |
| - fix: https://go.dev/cl/763766 |
| - report: https://go.dev/issue/78301 |
| - web: https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU |
| cve_metadata: |
| id: CVE-2026-32288 |
| cwe: 'CWE-400: Uncontrolled Resource Consumption' |
| source: |
| id: go-security-team |
| review_status: REVIEWED |
