by Kastro
Paper/Archive/CVE-2026-54527

CVE-2026-54527

jupyterlab jupyterlab-git — JupyterLab Git: Stored XSS leading to RCE

EPSS 0.5%public exploitCVSS 9.3
critical.is priorityof 100
47
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 44.7.447 × 208.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

JupyterLab Git is a Git extension for JupyterLab. From 0.30.0b3 before 0.54.0, the PlainTextDiff.ts createHeader() method passes Git filenames directly to innerHTML when rendering renamed files in commit history, allowing a crafted filename to execute JavaScript when a victim views the rename diff in the Git History tab. This issue is fixed in version 0.54.0.

Affected

ProductAffectedFixed inSource
jupyterlab-git>= 0.30.0b3, < 0.54.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
NVD9.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitgithub.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-f962-v9hr-pfg5refgithub.com/jupyterlab/jupyterlab-git/commit/c6d37b88f36aa59aee317930b95e427fb9d6b09brefgithub.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0