How severe is CVE-2026-35458?

CVE-2026-35458 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-35458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35458?

CVE-2026-35458 affects Thecodingmachine Gotenberg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35458?

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

Does CVE-2026-35458 have an EU (EUVD) identifier?

Yes. CVE-2026-35458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19651.

When was CVE-2026-35458 published?

CVE-2026-35458 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-35458

CVE-2026-35458 is a critical-severity vulnerability in Thecodingmachine Gotenberg with a CVSS 3.x base score of 9.8. 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-1333.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19651
Weakness: CWE-1333
Affected product: Thecodingmachine Gotenberg
Published: 2026-04-07
Last modified: 2026-06-17

Description

Gotenberg is an API for converting document formats. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile user-supplied scope patterns without setting a proper timeout. Users with access to features using this logic can hang workers indefinitely.

Frequently asked questions

What is CVE-2026-35458?: Gotenberg is an API for converting document formats. In 8.29.1 and earlier, Gotenberg uses dlclark/regexp2 to compile user-supplied scope patterns without setting a proper timeout. Users with access to features using this logic can hang workers indefinitely.
How severe is CVE-2026-35458?: CVE-2026-35458 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-35458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35458?: CVE-2026-35458 affects Thecodingmachine Gotenberg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-35458 have an EU (EUVD) identifier?: Yes. CVE-2026-35458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19651.
When was CVE-2026-35458 published?: CVE-2026-35458 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-fmwg-qcqh-m992

Affected products (1)

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

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