CVE-2026-9828 Affecting s3proxy package, versions <3.3.0-r3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-S3PROXY-17892536
- published8 Jul 2026
- disclosed28 May 2026
Introduced: 28 May 2026
CVE-2026-9828 (opens in a new tab)How to fix?
Upgrade Chainguard s3proxy to version 3.3.0-r3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream s3proxy package and not the s3proxy package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
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.