PT-2026-63280 · Go · Code.Gitea.Io/Gitea

CVE-2026-55984

·

Published

2026-07-21

·

Updated

2026-07-21

CVSS v3.1

2.7

Low

VectorAV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

Summary

The AddTime API handler continues execution after an error returned by GetUserByName().
When a repository administrator specifies a non-existent user name, an error response is generated but execution does not stop. Subsequent code dereferences a nil user pointer, resulting in a runtime panic.

Details

Affected endpoint:
http
POST /api/v1/repos/{owner}/{repo}/issues/{index}/times
Affected file:
text
routers/api/v1/repo/issue tracked time.go
Relevant code:
go
user, err = user model.GetUserByName(ctx, form.User)
if err != nil {
  ctx.APIErrorInternal(err)
  // missing return
}
Execution continues to:
go
trackedTime, err := issues model.AddTime(
  ctx,
  user,
  issue,
  form.Time,
  created,
)
When GetUserByName() fails, user is nil.
The subsequent call dereferences the nil pointer and triggers a runtime panic.

Proof of Concept

Using a repository administrator account:
http
POST /api/v1/repos/owner/repo/issues/1/times
Content-Type: application/json

{
 "time": 3600,
 "user name": "nonexistent user xyz"
}
Result:
text
HTTP 500
runtime error: invalid memory address or nil pointer dereference
The stack trace indicates execution reaches the AddTime code path with a nil user object.

Impact

An authenticated repository administrator can repeatedly trigger server-side panics through the affected endpoint.
Depending on deployment configuration and panic recovery behavior, this may result in request failures, stack trace disclosure, excessive log generation, or degraded service availability.

Suggested Fix

Add a return statement after the error response:
go
user, err = user model.GetUserByName(ctx, form.User)
if err != nil {
  ctx.APIErrorInternal(err)
  return
}

Fix

NULL Pointer Dereference

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Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-55984
GHSA-M932-CRVM-GCP5

Affected Products

Code.Gitea.Io/Gitea