CVE-2026-27018

Name: CVE-2026-27018
Creator: NVD / NIST
Published: 2026-03-30T21:17:08.383+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2026-27018 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

CVSS 4.0

7.8/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.54%

41.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Thecodingmachine	Gotenberg	< 8.29.0

References

https://github.com/gotenberg/gotenberg/commit/06b2b2e10c52b58135edbfe82e94d599eb0c5a11Patch
https://github.com/gotenberg/gotenberg/commit/8625a4e899eb75e6fcf46d28394334c7fd79fff5Patch
https://github.com/gotenberg/gotenberg/releases/tag/v8.29.0Product, Release Notes
https://github.com/gotenberg/gotenberg/security/advisories/GHSA-jjwv-57xh-xr6rExploit, Mitigation, Vendor Advisory
https://github.com/gotenberg/gotenberg/security/advisories/GHSA-jjwv-57xh-xr6rExploit, Mitigation, Vendor Advisory

Timeline

Published: Mar 30, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-27018?

How severe is CVE-2026-27018?

CVE-2026-27018 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2026-27018?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-27018?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST