Vulnerability in gix-fs (CVE-2026-44471)
Summary
Vulnerability in gix-fs (CVE-2026-44471). Successful exploitation can lead to full system takeover. Exploitable via payload. Mitigation: upgrade to 0.21.1 or later.
Original description
The description as published by the source.
gitoxide is an implementation of git written in Rust. Prior to 0.21.1, a malicious tree can be constructed that will, when checked out with gitoxide, permit writing an attacker-controlled symlink into any existing directory the user has write access to. During checkout, all symlink index entries are deferred and created after regular files using a single shared gix_worktree::Stack. Internally, this uses a gix_fs::Stack. gix_fs::Stack::make_relative_path_current() caches validated path prefixes: when the previously-processed leaf component exactly matches the leading component(s) of the next path, the leaf-to-directory transition at gix-fs/src/stack.rs invokes only delegate.push_directory(), never delegate.push(). In gix_worktree::stack::delegate::StackDelegate, when the state member is State::CreateDirectoryAndAttributesStack, Attributes::push_directory() only loads attributes (from the ODB, in the clone case), and does not perform any other checks. The on-disk symlink_metadata() check and unlink-on-collision live in StackDelegate::push()'s invocation of create_leading_directory(), which is therefore bypassed for the cached prefix. The final symlink is created with plain std::os::unix::fs::symlink, which follows symlinks in parent directories. Therefore, it's possible to provide a tree with duplicate symlink and directory entries that exploits this. This vulnerability is fixed in 0.21.1.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-44471 has been found in gix-fs.
Attackers can target a specific entry point like payload over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: upgrade gix-fs to 0.21.1 or later.
If unsure, ask your IT team or search "gix-fs CVE-2026-44471" on the vendor's site.
CVE-2026-44471 (gix-fs) — CWE-59 / CVSS v3 7.8
Attack vector: local / unauthenticated
Attack surface: payload / gix
Patched: 0.21.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-59) exists in gix-fs. Attackers reach the vulnerable code path via payload without authentication.
Check the vendor advisory for the affected versions of gix-fs. Attack surface: payload / gix.
Severity: High (CVSS 7.8/10). Successful exploitation can lead to full system takeover.
Update to 0.21.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'gix-fs' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'gix-fs' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
gix-fsを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade gix-fs to 0.21.1ステージング環境で 0.21.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-44471 rust-gix-fs
- Ubuntu UBUNTU-CVE-2026-44471 rust-gix-fs
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com