CVE-2026-40258Network attack vector

Arbitrary file write via unsanitized ZIP entries

Published Apr 17, 2026 · Updated Apr 17, 2026

Path traversal in Gramps Web API 1.6.0 through 3.11.0 allows remote authenticated users to write arbitrary server-local files. MediaImporter._check_disk_space_and_extract() passes attacker-controlled archive members to zipfile.extractall() without rejecting ../ path components. Owner-level access is required; persistent impact ranges from cross-tree database or media corruption to configuration overwrite, while hardened Postgres/S3 deployments expose only ephemeral container files.

CVSS severity9.1
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Gramps Web API 1.6.0 through 3.11.0 allows remote authenticated users to write arbitrary server-local files. MediaImporter._check_disk_space_and_extract() passes attacker-controlled archive members to zipfile.extractall() without rejecting ../ path components. Owner-level access is required; persistent impact ranges from cross-tree database or media corruption to configuration overwrite, while hardened Postgres/S3 deployments expose only ephemeral container files.

The record

CVE
CVE-2026-40258
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
The Gramps Project
Product
Gramps Web API
Classifications
CWE-22, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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=>= 1.6.0, < 3.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Gramps Project · Gramps Web APIversion=>= 1.6.0, < 3.11.1

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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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