High [CVE-2026-76219] Arbitrary File Overwrite via `git read-tree` option injection
This high-severity Red Hat Linux advisory covers CVE-2026-76219 affecting Red Hat Ansible Automation Platform 2, Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1.
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Summary
GitPython versions before 3.1.58 contain an arbitrary file overwrite vulnerability in IndexFile.from_tree, IndexFile.reset, and IndexFile.merge_tree methods that append caller-influenced treeish strings to git read-tree without option validation or argument separation.
Attackers can inject the --index-output option to overwrite arbitrary files with a valid git-index blob, destroying existing file content at attacker-controlled writable paths. A flaw was found in GitPython.
By injecting specific options into the `git read-tree` command through methods like `IndexFile.from_tree`, `IndexFile.reset`, and `IndexFile.merge_tree`, without proper option validation or argument separation, an attacker can cause the application to write a git-index blob to any attacker-controlled writable path, leading to data destruction.
Red Hat products that bundle GitPython use it as an internal build/automation-time dependency and do not expose these IndexFile treeish arguments to adversary-controlled input; the vulnerable input cannot be controlled by an attacker in these products, so they are marked not affected.
GitPython as shipped in Red Hat OpenStack Platform 16.2 and 17.1 contains the vulnerable library code and retains its affected determination. Red Hat severity: Important — CVSS 8.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H).
Weakness: CWE-88.
- < 3.1.58
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Do not pass untrusted or attacker-influenced treeish arguments to GitPython's IndexFile.from_tree, IndexFile.reset, or IndexFile.merge_tree. Upgrade to GitPython 3.1.58 or later, where option injection into `git read-tree` is fixed.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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