CVE entry · CVE-2017-1000353
CVE-2017-1000353: Jenkins Remote Code Execution Vulnerability
Jenkins contains a remote code execution vulnerability. This vulnerability that could allowed attackers to transfer a serialized Java SignedObject object to the remoting-based Jenkins CLI, that would be deserialized using a new ObjectInputStream, bypassing the existing blocklist-based protection mechanism.
- Actively exploited: added to CISA’s KEV catalog on October 2, 2025.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: October 23, 2025.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Jenkins, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.