# CVE-2026-9318: tablib versions prior to 3.10.0 Stored XSS via HTML Export Dataset Title

Status: published. Published: 2026-08-12. Updated: 2026-11-08.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/jazzband/tablib/pull/668
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/jazzband/tablib/releases/tag/v3.10.0

## Affected products and versions

- Jazzband / tablib (tablib): ≥ 0; < 3.10.0 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.30% as of 2026-11-08; percentile 22.68%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/jazzband/tablib (CNA: VulnCheck; product)

- https://github.com/jazzband/tablib/pull/668 (CNA: VulnCheck; issue-tracking, patch)

- https://github.com/jazzband/tablib/releases/tag/v3.10.0 (CNA: VulnCheck; patch, release-notes)

- https://www.vulncheck.com/advisories/tablib-versions-prior-to-stored-xss-via-html-export-dataset-title (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-9318; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-9318; retrieved 2026-11-08; source updated Not reported

Revision: 002f3038cefdcd26462c9ecdca2435ae122aac61a93513d17ded1f7c5053fc1a

Canonical: https://y2.dev/cve/CVE-2026-9318

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