CVE-2026-73431Network attack vector

Account takeover via reusable recovery tokens

Published Aug 12, 2026 · Updated Aug 12, 2026

Authentication bypass in Vulnerability-Lookup 5.5.1 and earlier allows remote attackers to take over accounts via captured recovery links. Activation and recovery tokens contain only the login, are neither purpose-bound nor recorded as consumed, and remain reusable after a password change. A currently valid link is required, but no existing password or authenticated session is needed; replay permits repeated password resets.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Vulnerability-Lookup 5.5.1 and earlier allows remote attackers to take over accounts via captured recovery links. Activation and recovery tokens contain only the login, are neither purpose-bound nor recorded as consumed, and remain reusable after a password change. A currently valid link is required, but no existing password or authenticated session is needed; replay permits repeated password resets.

The record

CVE
CVE-2026-73431
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
Computer Incident Response Center Luxembourg (CIRCL)
Product
Vulnerability-Lookup
Classifications
CWE-294, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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 <=5.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Computer Incident Response Center Luxembourg (CIRCL) · Vulnerability-Lookupversion=0 <=5.5.1

Published CVSS scores

8.8National Vulnerability DatabaseCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
T1098Account Manipulation

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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