CVE-2026-27812Network attack vector

Account takeover via poisoned password-reset links

Published Feb 26, 2026 · Updated Feb 26, 2026

Password reset poisoning in Wei-Shaw Sub2API before 0.1.85 allows remote attackers to create reset links using an attacker-controlled domain. The forgot-password endpoint builds the emailed reset URL from untrusted Host or forwarded-host request headers instead of a configured frontend origin. The attacker needs a target email and control of the injected domain; takeover follows if the poisoned link discloses the account's reset token.

CVSS severity9.1
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

Password reset poisoning in Wei-Shaw Sub2API before 0.1.85 allows remote attackers to create reset links using an attacker-controlled domain. The forgot-password endpoint builds the emailed reset URL from untrusted Host or forwarded-host request headers instead of a configured frontend origin. The attacker needs a target email and control of the injected domain; takeover follows if the poisoned link discloses the account's reset token.

The record

CVE
CVE-2026-27812
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Wei-Shaw
Product
Sub2API
Classifications
CWE-116, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=< 0.1.85

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wei-Shaw · Sub2APIversion=< 0.1.85

Published CVSS scores

8.0GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1190Exploit Public-Facing Application

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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