CVE-2026-27018Public exploitNetwork attack vector

Arbitrary file read via case-sensitive scheme filter

Published Mar 30, 2026 · Updated Mar 30, 2026

SSRF in Gotenberg before 8.29.0 allows remote attackers to read arbitrary files from its container through Chromium conversion. FilterDeadline compiles the default file-scheme deny-list case-sensitively, while Chromium normalizes mixed-case schemes after the check. Unauthenticated access to the URL or HTML conversion endpoint exposes readable container files, including configuration and credentials.

CVSS severity7.5
High
EPSS probability1.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Gotenberg before 8.29.0 allows remote attackers to read arbitrary files from its container through Chromium conversion. FilterDeadline compiles the default file-scheme deny-list case-sensitively, while Chromium normalizes mixed-case schemes after the check. Unauthenticated access to the URL or HTML conversion endpoint exposes readable container files, including configuration and credentials.

The record

CVE
CVE-2026-27018
Published
Mar 30, 2026
Updated
Mar 30, 2026
Vendor
Gotenberg
Product
Gotenberg
Classifications
CWE-22, CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gotenberg · Gotenbergversion=< 8.29.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.8GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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