CVE-2026-42590Public exploitNetwork attack vector

Unauthenticated file manipulation via prefixed metadata tags

Published May 14, 2026 · Updated May 14, 2026

File manipulation in Gotenberg before 8.30.0 allows remote attackers to rename, move, link, or change attributes of server files. The metadata-write blocklist compares complete keys against four pseudo-tags, but ExifTool strips accepted group prefixes before interpreting those keys; three attribute-changing pseudo-tags are also omitted. The route has no authentication by default, and mounted volumes or non-container deployments extend the consequence to arbitrary file reads and overwrites.

CVSS severity8.2
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File manipulation in Gotenberg before 8.30.0 allows remote attackers to rename, move, link, or change attributes of server files. The metadata-write blocklist compares complete keys against four pseudo-tags, but ExifTool strips accepted group prefixes before interpreting those keys; three attribute-changing pseudo-tags are also omitted. The route has no authentication by default, and mounted volumes or non-container deployments extend the consequence to arbitrary file reads and overwrites.

The record

CVE
CVE-2026-42590
Published
May 14, 2026
Updated
May 14, 2026
Vendor
Gotenberg
Product
Gotenberg
Classifications
CWE-184, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.30.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gotenberg · Gotenbergversion=< 8.30.0

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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