Public proof of conceptFix available

CVE-2026-27018

Q: Is CVE-2026-27018 actively exploited?

A proof-of-concept exploit exists for CVE-2026-27018, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2026-27018?

CVE-2026-27018 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

A public proof of concept exists; no exploitation attested.

Published2026-03-30
Fixed in8.29.0
WeaknessCWE-22 · CWE-918

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. 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.

Timeline

dates in UTC

2026-03-3021:17CVE 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-2026-27018?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-27018?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	< 8.29.0	8.29.0	NVD · OSV

gotenberg/gotenberg

Branch	Affected	Fixed in	Source
7.10	≤ 7.10.2	no fix published	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 8.29.0

Advisories and patches

github.comPatch
github.comPatch
github.comRelease Notes
github.comMitigation · Vendor Advisory

Detection

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

Sources

CISA-ADPSSVC decisionpoc2026-03-31
OpenCVESSVC decisionpoc—
CNACVSS 4.07.8read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-22, CWE-918read 2026-10-23
FIRST EPSSEPSS score1.6 %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:N/A:N
CVSS 4.0 vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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: 2026-03-30
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-27018?

Is CVE-2026-27018 actively exploited?

A proof-of-concept exploit exists for CVE-2026-27018, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-27018?

CVE-2026-27018 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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