CVE-2026-9828 (GCVE-0-2026-9828)

Vulnerability from cvelistv5 – Published: 2026-05-28 12:52 – Updated: 2026-05-29 08:07
VLAI
Title
Logback deserialization whitelist bypass for java.lang and java.util
Summary
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.
Severity
2.9 (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:L/U:Green
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 14:20 UTC
CWE
  • CWE-502 - Deserialization of untrusted data
Assigner
NCSC.ch CNA under the mitre root
CNA scorecard B 80/100 over 76 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
QOS.CH Sarl logback Affected: 0 , ≤ 1.5.32 (maven)
Unaffected: 1.5.33
guessed Create a notification for this product.
Date Public
2026-05-28 07:47
Credits
York Shen https://github.com/york-shen
Show details on NVD website
To clipboard 

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