Logback deserialization whitelist bypass for Proxy objects_CVE-2026-10532

2.9 / 10

LOW

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/RE:M/U:Green

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 Proxy objects.

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 1.5.33 inclusive.

Basic Information

ID CVE-2026-10532

Source NCSC.ch

Published Jun 1, 2026 at 11:30

Affected Product

Vendor QOS.CH Sarl

Product logback

Affected Versions QOS.CH Sarl logback 0

CWE Classification

CWE-502

References

logback.qos.ch /news.html

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    "published": "2026-06-01T11:30:47.894Z",
    "modified": "2026-06-01T11:30:47.894Z",
    "type": "cve",
    "title": "Logback deserialization whitelist bypass for Proxy objects",
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