Bug 2487912 (CVE-2026-11816)

Summary:	CVE-2026-11816 keras: Keras: Arbitrary file write via path traversal in archive extraction utilities
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	jkoehler, lphiri
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Keras. Attackers can exploit a path traversal vulnerability in the archive extraction utilities, specifically `filter_safe_tarinfos()` and `filter_safe_zipinfos()`. This occurs because the validation of archive member paths is performed against the process's current working directory (CWD) instead of the actual extraction destination. When the CWD is set to the filesystem root, this allows malicious paths to bypass security checks. Successful exploitation can lead to arbitrary file writes outside the intended directory, potentially enabling attackers to overwrite critical configuration files, inject malicious code, or corrupt machine learning data.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-06-11 15:01:35 UTC

Keras versions prior to 3.14.0 are vulnerable to a path traversal issue in the archive extraction utilities located in `keras/src/utils/file_utils.py`. The functions `filter_safe_tarinfos()` and `filter_safe_zipinfos()` validate archive member paths against the process current working directory (CWD) instead of the actual extraction destination. When the process runs with CWD set to `/`, which is common in Docker containers, CI/CD runners, and Jupyter environments, the validation boundary becomes the filesystem root, allowing traversal paths to bypass the security check. Additionally, the zip filter contains a bug that causes an `AttributeError` when a blocked entry is encountered, leading to incomplete extraction. Furthermore, Python 3.11 installations lack the `filter="data"` safety net, leaving them entirely reliant on the flawed CWD-based filter. Exploitation of this vulnerability can result in arbitrary file writes outside the intended extraction directory, enabling attackers to overwrite configuration files, inject malicious code, or corrupt machine learning datasets and pipelines.