Soft Serve is vulnerable to arbitrary file writing through its SSH API
Priority HIGH 67CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
Soft Serve is a self-hostable Git server for the command line. In versions 0.9.1 and below, attackers can create or override arbitrary files with uncontrolled data through its SSH API. This issue is fixed in version 0.10.0.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00345 28th percentileScored 2026-11-07
Fix Fixed soft-serve (charmbracelet): 0.10.0github.com/charmbracelet/soft-serve (Go): 0.10.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| charmbracelet | soft-serve | before 0.10.0 | 0.10.0 | Patch available | CNA |
| — | github.com/charmbracelet/soft-serve (Go) | before 0.10.0 | 0.10.0 | Patch available | GHSA-33pr-m977-5w97 |
- soft-serve Vendorcharmbracelet Affected before 0.10.0 Fixed in 0.10.0 Patch available CNA
- github.com/charmbracelet/soft-serve (Go) Vendor— Affected before 0.10.0 Fixed in 0.10.0 Patch available GHSA-33pr-m977-5w97
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:charm:soft_serve:*:*:*:*:*:*:*:* | — | — | charmbracelet |
- cpe:2.3:a:charm:soft_serve:*:*:*:*:*:*:*:* Versions — — ·charmbracelet
Remediation
- Fix · CNA soft-serve (charmbracelet) Fixed in 0.10.0
- Fix · GHSA-33pr-m977-5w97 github.com/charmbracelet/soft-serve (Go) Fixed in 0.10.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-58355
- 2026-10-03 Alias added: GHSA-33pr-m977-5w97
References
More charmbracelet vulnerabilities
- TI-2026-30142 Wish has SCP Path Traversal that allows arbitrary file read/write CVSS 3.1CRITICAL 9.6
- TI-2026-23661 Soft Serve: SSRF via unvalidated LFS endpoint in repo import CVSS 3.1CRITICAL 9.1
- TI-2025-39912 Soft Serve is vulnerable to SSRF through its Webhooks CVSS 3.1CRITICAL 9.1
- TI-2023-23497 Soft Serve Public Key Authentication Bypass Vulnerability when Keyboard-Interactive SSH Authentication is Enabled CVSS 3.1HIGH 7.5
- TI-2026-25759 Soft Serve: Authenticated repo import can clone server-local private repositories CVSS 4.0HIGH 7.1
- TI-2026-17863 Soft Serve is missing an authorization check in LFS lock deletion CVSS 3.1MEDIUM 5.4
Sources
- CVE-2025-58355 · CVE Program
- CVE-2025-58355 · NVD
- FIRST EPSS
- GHSA-33pr-m977-5w97 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences