CVE-2026-54528

JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch.fnmatchcase() in GitHandler.prepare() in jupyterlab_git/handlers.py to enforce excluded_paths, allowing an authenticated user on a case-insensitive filesystem to vary URL path casing and read excluded directories. This issue is fixed in version 0.54.0.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033	Patch
https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0	Release Notes
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h	Exploit Vendor Advisory
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:jupyter:jupyterlab-git:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-08 21:16

Updated : 2026-07-15 20:42

NVD link : CVE-2026-54528

Mitre link : CVE-2026-54528

CVE.ORG link : CVE-2026-54528

JSON object : View

Products Affected

jupyter

jupyterlab-git

CWE

CWE-178

Improper Handling of Case Sensitivity

{"id": "CVE-2026-54528", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54528", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-09T13:04:29.311015Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "jupyterlab", "product": "jupyterlab-git", "versions": [{"status": "affected", "version": "< 0.54.0"}]}]}], "published": "2026-07-08T21:16:49.407", "references": [{"url": "https://github.com/jupyterlab/jupyterlab-git/commit/460035275b5963dc96e364e60ba6a73717fbd033", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-436q-jwfr-rm2h", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-178"}]}], "descriptions": [{"lang": "en", "value": "JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch.fnmatchcase() in GitHandler.prepare() in jupyterlab_git/handlers.py to enforce excluded_paths, allowing an authenticated user on a case-insensitive filesystem to vary URL path casing and read excluded directories. This issue is fixed in version 0.54.0."}], "lastModified": "2026-07-15T20:42:15.410", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:jupyter:jupyterlab-git:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6C2856EB-52EE-47E9-A863-B630523105AB", "versionEndExcluding": "0.54.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}