CVE-2026-60007

In Eclipse Milo versions 0.6.0 through 1.1.4, username-token processing returns distinguishable errors for invalid RSA PKCS#1 v1.5 padding and other authentication failures, allowing an on-path attacker who captures a victim's `Basic128Rsa15`-encrypted username token to use repeated unauthenticated `ActivateSession` requests as a padding oracle, recover the victim's password, and authenticate with the recovered credentials.

Score

CVSS 4.0 9.1 Critical

Status

Analyzed - emo@eclipse.org

Published

2026-08-04

Last modified

2026-10-23

Weaknesses

CWE-204

Affected products

• Milo (Eclipse)
• Eclipse Milo (Eclipse Foundation)

References

• https://github.com/eclipse-milo/milo/commit/db59fae993a3a1bc66fffc8a2796d444b40285fb
• https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/183