8.8

CVE-2026-40885: goshs: Public collaborator feed leaks .goshs ACL credentials and enables unauthorized access

Analyzed
AliasesGHSA-7h3j-592v-jcrpGO-2026-5221
Published 21-04-2026Last modified 21-04-2026

Vulnerability summary

CVE-2026-40885 is a high (CVSS 8.8) vulnerability in goshs. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.45%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21483-1

Timeline

  1. 21-04-2026
    PublishedVulnerability first disclosed.
  2. 21-04-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

Increase +0.14 pp

From 0.31% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Goshs

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Github.com/patrickhener1 product
  • goshsAll versions (No fix recorded)
Github.com/patrickhener/goshs1 product
  • v2≥ 2.0.0-beta.4, < 2.0.0-beta.6
Goshs1 product
  • goshs2.0.0:beta4 | 2.0.0:beta5
Patrickhener1 product
  • goshs≥ 2.0.0-beta.4, < 2.0.0-beta.6

4 vendors · 4 products

References

3 links