Security readout for executives and security teams
Plain-English summary
MapLibre GL JS before 6.4.1 can fail to remove malicious HTML attributes from map attribution text. If an application renders attacker-controlled attribution, browser script can execute in the application’s security context, potentially exposing data or enabling unauthorized actions.
Executive priority
Treat internet-facing applications that render externally controlled attribution as an urgent remediation priority. Upgrade promptly and confirm the production bundle changed. Less-exposed deployments should remain prioritized because the vulnerable sanitizer is a client-side trust boundary and the reported impact is critical.
Technical view
DOM.sanitize() iterates a live NamedNodeMap while deleting attributes. Deletion shifts the collection, so an adjacent dangerous attribute can escape inspection. When attribution content is subsequently assigned through innerHTML, a surviving event-handler attribute such as onload or ontoggle may execute. Version 6.4.1 fixes the flaw.
Likely exposure
Exposure is limited to applications using MapLibre GL JS versions earlier than 6.4.1 that render untrusted third-party style attribution or user-supplied custom attribution. Applications without attacker influence over attribution content have lower practical exposure, but bundled and transitive copies should still be inventoried.
Exploitation context
The supplied sources describe network-reachable, low-complexity XSS without privileges or a separate user action beyond rendering affected map content. The CVSS 3.1 score is 10.0. This CVE is not listed as KEV in the bundle, and no supplied source establishes active exploitation.
Researcher notes
Validation should focus on the mutation-during-iteration defect and the attribution-to-innerHTML data path. Consecutive removable attributes are the key sanitizer edge case. Avoid treating library presence alone as proven exploitability; confirm attacker control of attribution and rendering by a victim. The supplied evidence does not establish exploitation in the wild.
Mitigation direction
- Upgrade MapLibre GL JS to version 6.4.1 or later.
- Identify and update bundled or transitive copies below version 6.4.1.
- Until upgraded, prevent untrusted parties from controlling style or custom attribution strings.
- Apply defense-in-depth browser policies according to existing application security guidance.
Validation and detection
- Confirm deployed MapLibre GL JS versions through manifests, lockfiles, bundles, and runtime asset inspection.
- Trace whether third-party styles or users can influence attribution content.
- Verify production assets resolve to version 6.4.1 or later after deployment.
- Run authorized regression tests confirming unsafe attribution attributes cannot survive sanitization.
- Review Content Security Policy telemetry for attempted inline event-handler execution.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-79: User-session and phishing behavior lookup
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Open ATT&CK lookupCVE-2026-85061 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
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SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N3.95.8GitHub_MVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/maplibre/maplibre-gl-js/security/advisories/GHSA-jrc7-96c5-q579CVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/maplibre/maplibre-gl-js/pull/8189CVE reference, GitHub_M · x_refsource_MISC
- https://github.com/maplibre/maplibre-gl-js/commit/1da69f3cd913a39fa948708e01478663bf48bc27CVE reference, GitHub_M · x_refsource_MISC
- https://github.com/maplibre/maplibre-gl-js/releases/tag/v6.4.1CVE reference, GitHub_M · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.