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High, CVSS 7.3

Gogs: DOM-based XSS via milestone selection

CVE-2026-26276GHSA-vgjm-2cpf-4g7c

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Go gogs.io/gogs

    Affected
    <= 0.13.3
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
EPSS
  • CVE-2026-26276: 0.22% estimated exploitation activity in the next 30 days; percentile 12.44 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary It was confirmed in a test environment that an attacker can store an HTML/JavaScript payload in a repository’s Milestone name, and when another user selects that Milestone on the New Issue page (/issues/new), a DOM-Based XSS is triggered. Impact Theft of information accessible in the victim’s session. Extraction of CSRF tokens and submission of state-changing requests with the victim’s privileges. Repository operations performed with the victim’s privileges (Issue operations, settings changes, etc.). (The impact scope depends on the victim’s permission level.) Remediation A fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-vgjm-2cpf-4g7c

Agent brief

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# Patch Next advisory brief: CVE-2026-26276

Advisory: Gogs: DOM-based XSS via milestone selection
IDs: CVE-2026-26276, GHSA-vgjm-2cpf-4g7c
Record: https://patchnext.com/advisories/cve-2026-26276 (revision 1, source checked 26 Oct 2026, 15:15 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go gogs.io/gogs: affected <= 0.13.3

## Suggested inspection (read-only)
- Go gogs.io/gogs: 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 gogs.io/gogs.
- 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://github.com/advisories/GHSA-vgjm-2cpf-4g7c (GitHub-reviewed advisory GHSA-vgjm-2cpf-4g7c lists affected ranges: Go gogs.io/gogs >=0 <=0.13.3)

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