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CVE-2026-44829

Gotenberg: Path traversal in zip entry name via Windows-style separators in upload filename

Published: Aug 19, 2026Updated: Aug 19, 2026 Sources: CVE List NVDCWE-22
8.8HIGH
NVD MITRE
EPSS Score
0.4%
Top 70.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, filename handling in pkg/modules/api/context.go uses filepath.Base on Linux, which does not treat backslashes as path separators, so a multipart filename containing Windows-style parent directory components survives sanitization. The original filename flows through ctx.diskToOriginal and the multi-output PDF routes into archives.FilesFromDisk and archives.Zip.Archive as the generated zip entry name. A remote attacker can submit a name such as ........\Windows\System32\evil.pdf through an upload or an upstream downloadFrom Content-Disposition header, and a Windows archive extractor can write the resulting file outside the intended extraction directory. The affected paths include /forms/pdfengines/split and other multi-output PDF, LibreOffice, and conversion routes, and exploitation can cause arbitrary file writes on a downstream Windows system when a user or process extracts the returned archive. This issue is fixed in version 8.33.0.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:LAvailability
Low
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Weaknesses

CWE-22

Affected Products

gotenberg
oss-project
gotenbergOn-prem
Cloud & SaaS / saas-application

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-hwc4-gmrw-5222
github.com
https://github.com/gotenberg/gotenberg/issues/662
github.com
https://github.com/gotenberg/gotenberg/commit/93d0103585372433e18b351bb16edf4c383932d3
github.com
and 1 more references View all →

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