CVE-2026-126815
Pre-account hijacking via planted password
Description
Pre-account hijacking in the authentication flow in Lagarto Chivato 0.4.1 and earlier on Web allows remote unauthenticated attackers to take over arbitrary accounts via a password planted on an unregistered email address that becomes valid upon the victim’s first passwordless login.
INFO
Published Date :
Nov. 11, 2026, 8:17 p.m.
Last Modified :
Nov. 11, 2026, 8:17 p.m.
Remotely Exploit :
Yes !
Source :
772f0079-75c2-41ca-913e-d9072716578b
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 772f0079-75c2-41ca-913e-d9072716578b |
Solution
- Ensure email addresses are registered before passwordless login.
- Update Lagarto Chivato to the latest version.
- Implement strict email verification.
- Review authentication flow logic.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-126815.
| URL | Resource |
|---|---|
| https://www.grayback.es/advisories | |
| https://www.grayback.es/en/advisories |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-126815 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-126815
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-126815 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-126815 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 772f0079-75c2-41ca-913e-d9072716578b
Nov. 11, 2026
Action Type Old Value New Value Added Description Pre-account hijacking in the authentication flow in Lagarto Chivato 0.4.1 and earlier on Web allows remote unauthenticated attackers to take over arbitrary accounts via a password planted on an unregistered email address that becomes valid upon the victim’s first passwordless login. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Added CWE CWE-287 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/126xxx/CVE-2026-126815.json">CVE-2026-126815</a> Added Reference https://www.grayback.es/advisories Added Reference https://www.grayback.es/en/advisories