CVE-2025-8454Network attack vector

Unverified source acceptance via cached archive reuse

Published Aug 1, 2025 · Updated Aug 1, 2025

Improper signature verification in Debian devscripts allows remote attackers to pass unverified source archives through uscan. When a prior run leaves an archive after failed OpenPGP validation, uscan treats the existing file as downloaded and skips verification on the next run. Exploitation requires a maintainer to rerun uscan against the retained file, allowing untrusted upstream source into packaging workflows.

CVSS severity9.8
Critical
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in Debian devscripts allows remote attackers to pass unverified source archives through uscan. When a prior run leaves an archive after failed OpenPGP validation, uscan treats the existing file as downloaded and skips verification on the next run. Exploitation requires a maintainer to rerun uscan against the retained file, allowing untrusted upstream source into packaging workflows.

The record

CVE
CVE-2025-8454
Published
Aug 1, 2025
Updated
Aug 1, 2025
Vendor
Debian
Product
devscripts
Classifications
CWE-347, T1553.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2025Record 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Debian · devscriptsversion=0

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1553.002Subvert Trust Controls: Code Signing

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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