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% (17th 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% (17th 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% (17th 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:*:*:*:*:*:*:*:*

More vulnerabilities in Thecodingmachine Gotenberg

CVE-2026-40281 — Critical (CVSS 10.0): Gotenberg is a Docker-powered stateless API for PDF files. In versions 8.30.1 and earlier, the metadata write endpoint…
CVE-2026-42589 — Critical (CVSS 9.8): Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, Gotenberg's…
CVE-2026-35458 — Critical (CVSS 9.8): Gotenberg is an API for converting document formats. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile…
CVE-2020-13452 — Critical (CVSS 9.8): In Gotenberg through 6.2.1, insecure permissions for tini (writable by user gotenberg) potentially allow an attacker to…
CVE-2020-13451 — Critical (CVSS 9.8): An incomplete-cleanup vulnerability in the Office rendering engine of Gotenberg through 6.2.1 allows an attacker to…
CVE-2020-13450 — Critical (CVSS 9.8): A directory traversal vulnerability in file upload function of Gotenberg through 6.2.1 allows an attacker to upload and…

All CVEs affecting Thecodingmachine Gotenberg →

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

CVE-2026-69502 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure SQL Database allows an unauthorized attacker to elevate privileges over a…
CVE-2026-65801 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges…
CVE-2026-48331 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in…
CVE-2026-54735 — Critical (CVSS 10.0): Prebid Server is an open-source solution for running real-time advertising auctions in the cloud. Prior to version…
CVE-2026-57106 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Data Quality allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-15409 — Critical (CVSS 10.0): A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface. A…

Browse all CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities →