CVE-2026-25050Public exploitNetwork attack vector

Username enumeration via authentication timing oracle

Published Jan 30, 2026 · Updated Jan 30, 2026

Timing side channel in Vendure before 3.5.3 allows remote attackers to enumerate valid account email addresses through login requests. The NativeAuthenticationStrategy.authenticate method returns immediately for an unknown user but performs a 200–400 ms bcrypt verification for an existing one. No credentials or user interaction are required, and repeated response-time measurements disclose account existence without changing data or interrupting service.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Timing side channel in Vendure before 3.5.3 allows remote attackers to enumerate valid account email addresses through login requests. The NativeAuthenticationStrategy.authenticate method returns immediately for an unknown user but performs a 200–400 ms bcrypt verification for an existing one. No credentials or user interaction are required, and repeated response-time measurements disclose account existence without changing data or interrupting service.

The record

CVE
CVE-2026-25050
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
Vendure
Product
Vendure
Classifications
CWE-202, T1589.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 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=< 3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vendure · Vendureversion=< 3.5.3

Published CVSS scores

2.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-202Exposure of Sensitive Information Through Data Queries
T1589.002Gather Victim Identity Information: Email Addresses

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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