How severe is CVE-2026-42591?

CVE-2026-42591 has a CVSS 3.x base score of 8.2, 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 low, and availability none.

Is CVE-2026-42591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42591?

CVE-2026-42591 affects Thecodingmachine Gotenberg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42591?

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-2026-42591 have an EU (EUVD) identifier?

Yes. CVE-2026-42591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30309.

When was CVE-2026-42591 published?

CVE-2026-42591 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-42591

CVE-2026-42591 is a high-severity vulnerability in Thecodingmachine Gotenberg with a CVSS 3.x base score of 8.2. 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-918.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30309
Weakness: CWE-918
Affected product: Thecodingmachine Gotenberg
Published: 2026-05-14
Last modified: 2026-06-17

Description

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, the LibreOffice conversion endpoint (/forms/libreoffice/convert) passes uploaded documents directly to LibreOffice without inspecting their content. LibreOffice then fetches any embedded external URLs on its own, completely bypassing the SSRF filters. This vulnerability is fixed in 8.32.0.

Frequently asked questions

What is CVE-2026-42591?: Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, the LibreOffice conversion endpoint (/forms/libreoffice/convert) passes uploaded documents directly to LibreOffice without inspecting their content. LibreOffice then fetches any embedded external URLs on its own, completely bypassing the SSRF filters. This vulnerability is fixed in 8.32.0.
How severe is CVE-2026-42591?: CVE-2026-42591 has a CVSS 3.x base score of 8.2, 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 low, and availability none.
Is CVE-2026-42591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42591?: CVE-2026-42591 affects Thecodingmachine Gotenberg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42591?: 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-2026-42591 have an EU (EUVD) identifier?: Yes. CVE-2026-42591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30309.
When was CVE-2026-42591 published?: CVE-2026-42591 was published on 2026-05-14 and last updated on 2026-06-17.

References

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-rm4c-xj6x-49mw

Affected products (1)

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

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