Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted.
More precisely, an attacker able to influence serialized data sent to
SimpleSocketServer or SimpleSSLSocketServer can instantiate objects from
classes in the java.lang and java.util packages that are not explicitly
blocked.
Although deserialization is heavily restricted by HardenedObjectInputStream and no
practical way to achieve remote code execution or significant privilege
escalation has been identified, this issue constitutes a bypass of the
intended security restrictions.
This issue affects logback: through 1.5.32 inclusive.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://logback.qos.ch/news.html#1.5.33 |
|
History
Thu, 28 May 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Thu, 28 May 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted. More precisely, an attacker able to influence serialized data sent to SimpleSocketServer or SimpleSSLSocketServer can instantiate objects from classes in the java.lang and java.util packages that are not explicitly blocked. Although deserialization is heavily restricted by HardenedObjectInputStream and no practical way to achieve remote code execution or significant privilege escalation has been identified, this issue constitutes a bypass of the intended security restrictions. This issue affects logback: through 1.5.32 inclusive. | |
| Title | Logback deserialization whitelist bypass for java.lang and java.util | |
| Weaknesses | CWE-502 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: NCSC.ch
Published:
Updated: 2026-05-28T14:20:37.401Z
Reserved: 2026-05-28T11:55:19.674Z
Link: CVE-2026-9828
Updated: 2026-05-28T14:20:33.887Z
Status : Received
Published: 2026-05-28T14:16:27.430
Modified: 2026-05-28T14:16:27.430
Link: CVE-2026-9828
No data.
OpenCVE Enrichment
Updated: 2026-05-28T16:00:14Z