CVE-2026-35465Network attack vector

Code execution via absolute gzip filenames

Published Apr 18, 2026 · Updated Apr 18, 2026

Path injection in SecureDrop Client 0.17.4 and earlier allows remote attackers to execute code in sd-app via a crafted gzip filename. read_gzip_header_filename() accepts an absolute gzip-header filename after check_path_traversal(), allowing replacement of the local svs.sqlite database. Exploitation requires control of the configured SecureDrop Server and a journalist to download the file; the overwrite yields code execution and access to decrypted submissions.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path injection in SecureDrop Client 0.17.4 and earlier allows remote attackers to execute code in sd-app via a crafted gzip filename. read_gzip_header_filename() accepts an absolute gzip-header filename after check_path_traversal(), allowing replacement of the local svs.sqlite database. Exploitation requires control of the configured SecureDrop Server and a journalist to download the file; the overwrite yields code execution and access to decrypted submissions.

The record

CVE
CVE-2026-35465
Published
Apr 18, 2026
Updated
Apr 18, 2026
Vendor
Freedom of the Press Foundation
Product
SecureDrop Client
Classifications
CWE-73, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 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=< 0.17.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Freedom of the Press Foundation · SecureDrop Clientversion=< 0.17.5

Published CVSS scores

7.5Freedom of the Press FoundationCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-73External Control of File Name or Path
T1204.002Malicious File

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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