How severe is CVE-2026-27018?

CVE-2026-27018 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27018 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27018?

CVE-2026-27018 affects Thecodingmachine Gotenberg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27018?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27018 have an EU (EUVD) identifier?

Yes. CVE-2026-27018 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17198.

When was CVE-2026-27018 published?

CVE-2026-27018 was published on 2026-03-30 and last updated on 2026-06-17.

CVE-2026-27018

CVE-2026-27018 is a high-severity vulnerability in Thecodingmachine Gotenberg with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.8
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17198
Weakness: CWE-22
Affected product: Thecodingmachine Gotenberg
Published: 2026-03-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-27018?: 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.
How severe is CVE-2026-27018?: CVE-2026-27018 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27018 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27018?: CVE-2026-27018 affects Thecodingmachine Gotenberg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27018?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27018 have an EU (EUVD) identifier?: Yes. CVE-2026-27018 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17198.
When was CVE-2026-27018 published?: CVE-2026-27018 was published on 2026-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*

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