Description
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.
Metrics
CVSS 3.1 7.4/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Eclipse Foundation | Eclipse Milo | >= 0.6.0, <= 1.1.4 |
References
- https://github.com/eclipse-milo/milo/commit/db59fae993a3a1bc66fffc8a2796d444b40285fbPatch
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/183Issue Tracking, Patch, Vendor Advisory
- https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598Issue Tracking, Vendor Advisory
Timeline
- Published
- Aug 4, 2026
- Last modified
- Oct 23, 2026
- NVD status
- Analyzed