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CVE-2026-10532— Logback deserialization whitelist bypass for Proxy objects

Quick assessment

Affected
QOS.CH Sarl logback
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

logback是QOS.CH开源的一个可靠、通用、快速且灵活的 Java 日志记录框架。 logback 1.5.33及之前版本存在安全漏洞，该漏洞源于反序列化不可信数据，可能导致对象注入，尽管受到严格限制。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
QOS.CH Sarl logback ≤ 1.5.33 affected
1.5.34 unaffected
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I. Basic Information for CVE-2026-10532

Vulnerability Information
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Vulnerability Title
Logback deserialization whitelist bypass for Proxy objects
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
logback 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
logback是QOS.CH开源的一个可靠、通用、快速且灵活的 Java 日志记录框架。 logback 1.5.33及之前版本存在安全漏洞，该漏洞源于反序列化不可信数据，可能导致对象注入，尽管受到严格限制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
QOS.CH Sarl logback 0 ~ 1.5.33 -

II. Public POCs for CVE-2026-10532

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III. Intelligence Information for CVE-2026-10532

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IV. Related Vulnerabilities

Same product: logback
Same vendor: QOS.CH Sarl
Same weakness: CWE-502

V. Comments for CVE-2026-10532

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