CISA KEV Alert: CVE-2026-60004 — Gitea Code Injection Vulnerability | Active...

Executive Summary

The CISA KEV catalog now flags CVE‑2026‑60004, a code‑injection flaw in Gitea that lets an adversary with repository write rights plant a malicious Git hook and execute arbitrary shell commands as the Gitea service account. All on‑premises and cloud‑hosted Gitea instances are immediately at risk of remote code execution, with a federal remediation deadline of 2026‑08‑28. Decision makers must authorize emergency patching or mitigation, assess internet‑exposed Gitea assets, and trigger incident response if exploitation is suspected.

Verified Facts

• Gitea contains a code injection vulnerability (CVE‑2026‑60004) that allows an attacker with repository write access to send a malicious patch to the diffpatch API endpoint to plant an executable Git hook and run shell commands as the Gitea service account — CISA KEV Alert.
• The vulnerability was added to the KEV catalog on 2026‑08‑25 with a federal remediation deadline of 2026‑08‑28 — CISA KEV Alert.
• CISA requires organizations to apply vendor mitigations, evaluate internet exposure, and follow BOD 26‑04 patching guidance — CISA KEV Alert.

Threat Classification

Threat type: Remote code execution via code injection (HIGH CONFIDENCE). Affected sectors: software development, DevOps, cloud services, any industry using Gitea for source control (MEDIUM CONFIDENCE). Geographic scope: Global (HIGH CONFIDENCE). Exploitation status: Active exploitation confirmed (HIGH CONFIDENCE). Attacker motivation: Obtain execution privileges on the Gitea host to further compromise internal systems (MEDIUM CONFIDENCE).

Threat Severity Assessment

• Exploitability: The vulnerability can be triggered by any user with repository write access, a common permission in CI/CD pipelines (HIGH CONFIDENCE).
• Impact scope: Successful exploitation runs commands as the Gitea service account, potentially leading to full host compromise (HIGH CONFIDENCE).
• Prevalence: Gitea is widely deployed in both on‑prem and SaaS environments; the KEV listing indicates broad relevance (MEDIUM CONFIDENCE).
• Remediation window: Federal deadline within three days creates urgent pressure to patch (HIGH CONFIDENCE).

Business Impact

Successful exploitation can lead to unauthorized code execution on build servers, causing production outages, loss of intellectual property, and breach of supply‑chain integrity. Under GDPR or NIS2, a breach involving personal data or critical infrastructure could trigger fines up to €20 million or 4 % of global turnover. SOC 2 compliance may be jeopardized if the incident reveals inadequate change‑control monitoring, exposing the organization to audit penalties and loss of customer trust. Reputational damage includes negative press and erosion of developer‑community confidence, potentially affecting revenue from SaaS offerings.

Technical Analysis

• Attack vector: Authenticated API call to the diffpatch endpoint using a crafted patch payload.
• Exploitation chain: Attacker with repository write permission → submits malicious patch → diffpatch API processes payload → creates executable Git hook in the repository → Gitea service account executes hook → arbitrary shell command execution.
• Affected component: Gitea diffpatch API endpoint; execution context: Gitea service account.
• Root cause: Insufficient validation of patch content allowing code injection (CWE‑20: Improper Input Validation).

CVE Analysis

• CVE‑2026‑60004 — Gitea code injection vulnerability — CWE‑20: Improper Input Validation — Network‑accessible API (diffpatch) — Authenticated (requires repository write access) — Patch available per vendor advisory.

MITRE ATT&CK Mapping

• Execution → T1059: Command and Scripting Interpreter — attacker runs shell commands via malicious Git hook as described in the vulnerability.
• Persistence → T1543.003: Create or Modify System Process: Windows Service (Git hook acting as a persistent executable) — planting executable Git hook ensures repeated execution.
• Privilege Escalation → T1068: Exploitation for Privilege Escalation — leveraging repository write access to gain code execution as the Gitea service account.

IOC Intelligence

No public IOCs confirmed at time of publication.

Behavioral IOC categories for rule creation:

• API calls to the Gitea diffpatch endpoint containing unusually large or binary patch payloads.
• Creation of new executable files in any repository’s .git/hooks directory.
• Process spawn events where the Gitea binary launches a shell (e.g., /bin/sh, cmd.exe) with the parent process ID of the Gitea service.
• Outbound network connections from the Gitea host shortly after a new Git hook execution.

Detection Engineering Guidance

• Collect Gitea web server access logs; alert on POST requests to /api/v1/diffpatch with Content‑Type application/octet-stream or unusually large bodies.
• Enable Sysmon Event ID 1 (Process Creation) and Event ID 11 (File Creation) on Gitea hosts; flag any executable file creation under .git/hooks.
• Correlate Windows Security Event ID 4688 (Process Creation) where the parent image is gitea.exe and the child image is a shell interpreter.
• Monitor outbound connections from the Gitea service account (e.g., process name gitea) within 5 minutes of a new hook execution.
• Use a SIEM rule that joins the above events to generate a high‑severity alert when all three conditions occur within a 10‑minute window.

Sigma Rules

title: Gitea Diffpatch Malicious Patch Upload
id: 3f9c2a1e-5b4d-4f9a-9c2e-1a2b3c4d5e6f
status: stable
description: Detects POST requests to the Gitea diffpatch API with large or binary payloads indicative of malicious patch injection.
author: CYBERDUDEBIVASH Sentinel Apex
logsource:
    product: webserver
    service: http
detection:
    selection:
        uri: '/api/v1/diffpatch'
        http_method: 'POST'
        request_body|contains: 'git-hook'
        request_body|length: '>5000'
    condition: selection
falsepositives:
    - Legitimate large patch uploads during bulk migrations
level: high
tags:
    - attack.execution
    - attack.t1059

title: Creation of Executable Git Hook
id: a1b2c3d4-5678-90ab-cdef-1234567890ab
status: stable
description: Detects creation of executable files in a repository's .git/hooks directory, a typical persistence mechanism for Gitea exploitation.
author: CYBERDUDEBIVASH Sentinel Apex
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        EventID: 11
        TargetFilename|contains: '\\.git\\hooks\\'
        Image|endswith: '.exe'
    condition: selection
falsepositives:
    - Legitimate custom hooks deployed by developers
level: high
tags:
    - attack.persistence
    - attack.t1543.003

Threat Hunting Queries

• Hypothesis: Malicious patch uploaded to diffpatch API — Source: Web server access logs; query for POST requests to /api/v1/diffpatch with payload size >5 KB.
• Hypothesis: Executable Git hook creation — Source: Sysmon Event ID 11; query for file creations where TargetFilename matches *.git\hooks\*.exe.
• Hypothesis: Shell spawned by Gitea service — Source: Windows Security Event ID 4688; query for processes where NewProcessName is cmd.exe or sh and ParentProcessName is gitea.exe.
• Hypothesis: Outbound connections after hook execution — Source: NetFlow or firewall logs; query for connections from Gitea host IP within 10 minutes of a new hook file creation.
• Hypothesis: Unauthorized repository write activity preceding exploitation — Source: Gitea audit logs; query for push events by users not in the approved CI/CD group.

SOC Analyst Playbook

• P0 – Immediate (0‑1 hr): Pull recent Gitea web logs; isolate any IPs that performed POST to /api/v1/diffpatch with large bodies. Block the source IP at the firewall.
• P0 – Immediate (0‑1 hr): Query Sysmon for Event ID 11 creating executable files in .git/hooks. If found, quarantine the host and collect the file hash.
• P1 – Urgent (1‑4 hr): Run a process tree on the affected host to identify any shell processes spawned by gitea.exe. Capture memory dump for forensic analysis.
• P1 – Urgent (1‑4 hr): Verify patch status against vendor advisory; if no patch applied, apply the vendor‑provided mitigation per CISA guidance.
• P2 – Same‑day (4‑24 hr): Update asset inventory to flag all internet‑exposed Gitea instances. Initiate a compliance check against BOD 26‑04 patching timelines.

Executive Decision Matrix

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