CVE-2025-13353

Secret recovery via incomplete seed decryption

Published Dec 2, 2025 · Updated Dec 2, 2025

Insufficiently random key derivation in Cloudflare gokey before 0.2.0 allows local users to recover seed-derived secrets. The unwrapSeed function passes a nonzero-length destination slice to AES-GCM Open, so decrypted bytes are appended outside the returned buffer while only the IV and authentication tag remain as derivation input. Exploitation requires possession of an encrypted seed file created for the -s workflow; master-password-only generation and seed confidentiality are unaffected.

CVSS severity7.1
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficiently random key derivation in Cloudflare gokey before 0.2.0 allows local users to recover seed-derived secrets. The unwrapSeed function passes a nonzero-length destination slice to AES-GCM Open, so decrypted bytes are appended outside the returned buffer while only the IV and authentication tag remain as derivation input. Exploitation requires possession of an encrypted seed file created for the -s workflow; master-password-only generation and seed confidentiality are unaffected.

The record

CVE
CVE-2025-13353
Published
Dec 2, 2025
Updated
Dec 2, 2025
Vendor
Cloudflare
Product
gokey
Classifications
CWE-330
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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=0.1.0 <0.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Cloudflare · gokeyversion=0.1.0 <0.2.0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1Cloudflare, Inc.CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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