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CVE-2026-27018

Thecodingmachine Gotenberg server-side request forgery (SSRF)

7.5 HIGHPublic exploitEPSS 1.63%
  1. Published30 Mar 2026

Description

Gotenberg is an API for converting document formats. Prior to version 8.29.0, the fix introduced for CVE-2024-21527 can be bypassed using mixed-case or uppercase URL schemes. This issue has been patched in version 8.29.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Thecodingmachine Gotenberg< 8.29.0

Remediation

Fixed in
Thecodingmachine Gotenberg≥ 8.29.0

References

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Frequently asked

Is CVE-2026-27018 being actively exploited?

CVE-2026-27018 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.63%.

How severe is CVE-2026-27018?

CVE-2026-27018 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 1.63% probability of exploitation.

Which products are affected by CVE-2026-27018?

Affected products include Thecodingmachine Gotenberg.

How do I fix CVE-2026-27018?

Upgrade affected software to a fixed version, for example Thecodingmachine Gotenberg 8.29.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-27018 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.