Quick answers
- Is CVE-2026-90490 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-90490 being exploited in the wild.
- How severe is CVE-2026-90490?
- Medium severity, with a CVSS score of 6.3, published 13 September 2026.
- Which products and versions are affected?
- Lenve Vhr 1.0-SNAPSHOT.
- Is there a fix for CVE-2026-90490?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-90490 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-90490?
- Check whether you run Lenve Vhr at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This is a Java deserialization vulnerability in the MailReceiver component of Lenve VHR 1.0-SNAPSHOT. The vulnerability occurs when untrusted serialized Java objects are deserialized without proper validation, allowing an attacker to craft malicious payloads using gadget chains (e.g., Apache Commons Collections) to achieve remote code execution. The attack is delivered remotely via RabbitMQ message queue to the javaboy.mail.queue queue. No authentication is required if the RabbitMQ service is accessible or uses default credentials (guest:guest). The exploit is publicly available and has been released. A proof-of-concept demonstrates successful command execution on the target system. The vendor did not respond to early disclosure notifications.
Affected products
- Lenve VHR 1.0-SNAPSHOT
Timeline
- 2026-09-13: disclosed: Public disclosure via GitHub advisory
- exploited: Exploit proof-of-concept publicly released