Bug 2514468 (CVE-2026-9318)

Summary:	CVE-2026-9318 tablib: tablib: Arbitrary JavaScript execution via stored Cross-Site Scripting in HTML export
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anthomas, dranck, dschmidt, ehelms, ggainey, jlanda, jmitchel, jpasqual, juwatts, jwong, kshier, lbrazdil, mdellweg, mhulan, mminar, nmoumoul, omaciel, osousa, pcreech, rbiba, rchan, simaishi, smallamp, sskracic, stcannon, teagle, tmalecek, tpfromme, ttakamiy, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in tablib. This vulnerability, a stored cross-site scripting (XSS) issue, allows a remote attacker to execute arbitrary JavaScript code. By embedding malicious payloads within dataset titles, which are not properly sanitized during HTML export, an attacker can trigger the execution of these scripts when the exported HTML is viewed in a browser. This could lead to consequences such as session hijacking, unauthorized administrative actions, and the exposure of sensitive data.	Story Points:	---
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Last Closed:		Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2514472, 2514473
Bug Blocks:

Description OSIDB Bzimport 2026-08-12 02:41:52 UTC

tablib prior to 3.10.0 contains a stored cross-site scripting vulnerability in the HTML export functionality that allows attackers to execute arbitrary JavaScript by embedding malicious payloads in dataset titles, which are interpolated unsanitized into HTML output via the export_book method in the _html.py format handler. Attackers can rename worksheet sheets in imported files such as XLSX, ODS, XLS, or YAML with script payloads that are assigned to the Dataset title attribute and rendered unescaped inside an HTML h3 tag, leading to session hijacking, unauthorized administrative actions, and sensitive data exposure when the output is rendered in a browser.