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CVE PROGRAM SOURCE RECORD2.9 Low

CVE-2026-9828

Logback deserialization whitelist bypass for java.lang and java.util

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Status
Published
Published
Updated
Assigning organization
NCSC.ch

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

QOS.CH Sarl logback

Default version status: unaffected

  • 0 to ≤ 1.5.32affected
  • 1.5.33unaffected

References