XSS in Jazzband Tablib
CVE-2026-9318
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Jazzband Tablib — versions 0
Weakness classification (CWE)
References
- github.com/jazzband/tablib (product)
- github.com/jazzband/tablib/pull/668 (issue-tracking)
- github.com/jazzband/tablib/releases/tag/v3.10.0 (patch)
- www.vulncheck.com/advisories/tablib-versions-prior-to-stored-xss-via-html-expor… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-9318?
- CVE-2026-9318 is a medium-severity vulnerability in Jazzband Tablib, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-08-12.
- How severe is CVE-2026-9318?
- Medium severity. CVSS v3 base score is 5.4 out of 10.