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TI-2026-85957 Aliases CVE-2026-123619GHSA-9pg5-8hpj-vq4p

Lektor Path Traversal via Admin API Drive-Letter Paths on Windows

Priority MEDIUM 60CWE-36Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Lektor through 3.3.14 and from 3.4.0b1 through 3.4.0b15 contains an absolute path traversal flaw in its admin API on Windows (CWE-36). The cleanup_path function does not normalise drive-letter paths, so supplied paths can escape the project directory. A malicious web page can send cross-site requests or use DNS rebinding against the unauthenticated local server. The attacker can then recursively delete directories through deleterecord or write attacker-controlled files through newattachment.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Lektor through 3.3.14 and 3.4.0b15 contains an absolute path traversal vulnerability in the admin API on Windows that allows attackers to escape the project directory by supplying drive-letter paths that cleanup_path does not normalise. Attackers can use a malicious web page with cross-site requests or DNS rebinding against the unauthenticated local server to recursively delete directories via deleterecord or write attacker-controlled files via newattachment.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00467 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lektorlektorup to 3.3.14; 3.4.0b1 – 3.4.0b15—No fix listedCNA
  • lektor Vendorlektor Affected up to 3.3.14; 3.4.0b1 – 3.4.0b15 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Lektor.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-123619
  2. 2026-11-06 Alias added: GHSA-9pg5-8hpj-vq4p
  3. 2026-11-06 CISA SSVC decision points changed

References

Patch 2

Other 4

  • TI-2026-65775 Lektor 3.3.14 CSRF via Admin API Endpoints CVSS 4.0HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences