CVE-2026-110652

MEDIUM 4.0

ONLYOFFICE DocumentServer before 10.0.0 SSRF via downloadfile isInJwtToken Bypass

CVSS Score

4.0

EPSS Score

0.0%

EPSS Percentile

0th

ONLYOFFICE DocumentServer before 10.0.0 contains an unauthenticated server-side request forgery vulnerability in the /downloadfile/:docid endpoint that allows remote attackers to bypass the private-IP request-filtering-agent by exploiting the isInJwtToken flag when JWT verification is disabled in the default configuration. Attackers can submit a crafted request body containing an internal or loopback URL, which is treated as a DIRECT request skipping private-address filtering, causing the server to fetch and proxy back arbitrary private-network and cloud metadata content.

CWE	CWE-918
Vendor	onlyoffice
Product	documentserver
Published	Oct 14, 2026
Last Updated	Oct 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

ONLYOFFICE / DocumentServer

2.5.0 < 10.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/ONLYOFFICE/DocumentServer/releases/tag/v10.0.0 github.com: https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#1000 vulncheck.com: https://www.vulncheck.com/advisories/onlyoffice-documentserver-before-ssrf-via-downloadfile-isinjwttoken-bypass

Credits

Leowsy-Hashblue