CVE-2026-76219
Description
A flaw was found in GitPython. This vulnerability allows an attacker to overwrite arbitrary files on the system. 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.
Statement
GitPython's IndexFile.from_tree, IndexFile.reset, and IndexFile.merge_tree append caller-influenced treeish strings to git read-tree without option validation or argument separation, letting an attacker who controls those arguments inject the --index-output option to overwrite arbitrary files at attacker-controlled writable paths (data destruction), fixed in 3.1.58. 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.
Mitigation
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.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.1 | N/A | 8.1 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Understanding the Weakness (CWE)
Confidentiality,Integrity,Availability,Other
Technical Impact: Execute Unauthorized Code or Commands; Alter Execution Logic; Read Application Data; Modify Application Data
An attacker could include arguments that allow unintended commands or code to be executed, allow sensitive data to be read or modified or could cause other unintended behavior.
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