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TI-2026-29541 Aliases CVE-2026-40885GHSA-7h3j-592v-jcrp

goshs: Public collaborator feed leaks .goshs ACL credentials and enables unauthorized access

Priority HIGH 69CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

goshs is a SimpleHTTPServer written in Go. From 2.0.0-beta.4 to 2.0.0-beta.5, goshs leaks file-based ACL credentials through its public collaborator feed when the server is deployed without global basic auth. Requests to .goshs-protected folders are logged before authorization is enforced, and the collaborator websocket broadcasts raw request headers, including Authorization. An unauthenticated observer can capture a victim's folder-specific basic-auth header and replay it to read, upload, overwrite, and delete files inside the protected subtree. This vulnerability is fixed in 2.0.0-beta.6.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00311 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed goshs (patrickhener): 2.0.0-beta.6github.com/patrickhener/goshs/v2 (Go): 2.0.0-beta.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
patrickhenergoshs2.0.0-beta.4 to before 2.0.0-beta.62.0.0-beta.6Patch availableCNA
—github.com/patrickhener/goshs/v2 (Go)2.0.0-beta.4 to before 2.0.0-beta.62.0.0-beta.6Patch availableGHSA-7h3j-592v-jcrp
  • goshs Vendorpatrickhener Affected 2.0.0-beta.4 to before 2.0.0-beta.6 Fixed in 2.0.0-beta.6 Patch available CNA
  • github.com/patrickhener/goshs/v2 (Go) Vendor— Affected 2.0.0-beta.4 to before 2.0.0-beta.6 Fixed in 2.0.0-beta.6 Patch available GHSA-7h3j-592v-jcrp

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:goshs:goshs:2.0.0:beta4:*:*:*:go:*:*2.0.0 beta4Vulnerablepatrickhener
cpe:2.3:a:goshs:goshs:2.0.0:beta5:*:*:*:go:*:*2.0.0 beta5Vulnerablepatrickhener
  • cpe:2.3:a:goshs:goshs:2.0.0:beta4:*:*:*:go:*:* Versions 2.0.0 beta4 Vulnerable ·patrickhener
  • cpe:2.3:a:goshs:goshs:2.0.0:beta5:*:*:*:go:*:* Versions 2.0.0 beta5 Vulnerable ·patrickhener

Remediation

  • Fix · CNA goshs (patrickhener) Fixed in 2.0.0-beta.6
  • Fix · GHSA-7h3j-592v-jcrp github.com/patrickhener/goshs/v2 (Go) Fixed in 2.0.0-beta.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40885
  2. 2026-10-03 Alias added: GHSA-7h3j-592v-jcrp

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-29540 goshs: Empty-username SFTP password authentication bypass in goshs CVSS 3.1CRITICAL 9.8
  • TI-2026-27601 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in goshs CVSS 3.0CRITICAL 9.8
  • TI-2026-27529 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in goshs POST multipart upload CVSS 3.0CRITICAL 9.8
  • TI-2026-27528 goshs has an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in goshs PUT Upload CVSS 3.0CRITICAL 9.8
  • TI-2026-29003 goshs has a file-based ACL authorization bypass in goshs state-changing routes CVSS 4.0CRITICAL 9.3
  • TI-2026-29532 SFTP root escape via prefix-based path validation in goshs CVSS 4.0HIGH 8.7
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences