Gotify: Insufficiently Protected Password Change endpoint

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-102603: 0.34% estimated exploitation activity in the next 30 days; percentile 26.97 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

The password change endpoint (POST /current/user/password) in Gotify versions <= 2.9.1 does not require knowledge of the current password. An attacker in possession of a valid client token can set a new password for the affected user. Recovering the account requires administrator intervention or direct database access. PoC Mitigation - Upgrade to Gotify 3.0.0, which introduces step-up authentication: changing the password now requires re-authenticating with the account password, or - Restrict access to the state-changing endpoints under /user and /current/user to trusted networks.

Published by the source

15 Oct 2026, 20:15 UTC

Last modified by the source

19 Oct 2026, 21:31 UTC

Source last checked

26 Oct 2026, 15:32 UTC

1. Revision 4 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-3hcj-9m7p-wwm9

2. Revision 3 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6772

4. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-3hcj-9m7p-wwm9

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# Patch Next advisory brief: CVE-2026-102603

Advisory: Gotify: Insufficiently Protected Password Change endpoint
IDs: CVE-2026-102603, GHSA-3hcj-9m7p-wwm9
Record: https://patchnext.com/advisories/cve-2026-102603 (revision 4, source checked 26 Oct 2026, 15:32 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: github.com/gotify/server/v3 3.0.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/gotify/server: affected every version
- Go github.com/gotify/server/v3: affected < 3.0.0; fixed in 3.0.0
- Go github.com/gotify/server/v2: affected <= 2.9.1

## Suggested inspection (read-only)
- Go github.com/gotify/server: check the installed version with your package manager.
- Go github.com/gotify/server/v3: check the installed version with your package manager.
- Go github.com/gotify/server/v2: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/gotify/server, github.com/gotify/server/v3, github.com/gotify/server/v2.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GO-2026-6772 (OSV record GO-2026-6772 lists affected ranges: Go github.com/gotify/server >=0; Go github.com/gotify/server/v2 >=0; Go github.com/gotify/server/v3 >=0 <3.0.0 (fixed))
- Verified: https://osv.dev/vulnerability/GHSA-3hcj-9m7p-wwm9 (OSV record GHSA-3hcj-9m7p-wwm9 lists affected ranges: Go github.com/gotify/server/v2 >=0 =0 <3.0.0 (fixed))
- Verified: https://github.com/advisories/GHSA-3hcj-9m7p-wwm9 (GitHub-reviewed advisory GHSA-3hcj-9m7p-wwm9 lists affected ranges: Go github.com/gotify/server/v2 >=0 =0 <3.0.0)

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