Answer in brief
CVE-2026-5917 records a High severity (CVSS 8.6) vulnerability in libgit2 Shell Command Injection via ssh_libssh2 Backend. The current sources do not mark it as known exploited. The current feed maps libgit2/libgit2 (generic), libgit2/libgit2 (generic), libgit2/libgit2 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps libgit2/libgit2 (generic), libgit2/libgit2 (generic), libgit2/libgit2 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| libgit2/libgit2generic | * | Not reported |
| libgit2/libgit2generic | 0.27.0 | Not reported |
| libgit2/libgit2generic | >=0 <1.8.7 || >=1.9.0 <1.9.7 | 1.8.7, 1.9.7 |
Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
libgit2 versions before 1.8.7 and 1.9.0 before 1.9.7 built with the libssh2 SSH backend (USE_SSH=libssh2) contain a shell command injection vulnerability that allows remote attackers to execute arbitrary commands on an SSH server by supplying a repository path containing unescaped shell metacharacters such as single quotes, semicolons, or pipes. The gen_proto() function in ssh_libssh2.c inserts the repository path directly into a shell command string without escaping special characters before passing it to libssh2_channel_exec(), enabling an attacker to craft a malicious submodule URL in a .gitmodules file that, when processed during a recursive clone, causes the remote server's shell to interpret injected commands under the victim's SSH user account.
Quoted source text, attributed separately from HOL analysis.