Public proof of conceptFix available

CVE-2026-35458

Q: Is CVE-2026-35458 actively exploited?

A proof-of-concept exploit exists for CVE-2026-35458, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2026-35458?

CVE-2026-35458 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2026-04-07
Fixed in8.29.1
WeaknessCWE-1333

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-04-0715:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-35458?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-35458?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Thecodingmachine gotenberg

Branch	Affected	Fixed in	Source
8.29	< 8.29.1	8.29.1	NVD

gotenberg/gotenberg

Branch	Affected	Fixed in	Source
—	all versions	no fix published	OSV

gotenberg/gotenberg

Branch	Affected	Fixed in	Source
8.30	< 8.30.0	8.30.0	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Thecodingmachine gotenberg to 8.29.1

Advisories and patches

github.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionpoc2026-04-09
OpenCVESSVC decisionpoc—
CNACVSS 4.08.7read 2026-10-23
CISA-ADPCVSS 3.19.82026-04-09
CNAweakness (CWE)CWE-1333read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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
Published: 2026-04-07
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-35458?

Is CVE-2026-35458 actively exploited?

A proof-of-concept exploit exists for CVE-2026-35458, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-35458?

CVE-2026-35458 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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