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VulnerabilityPublished

CVE-2026-40905: Kovah LinkAce · Open Redirect

Affects Kovah LinkAceSource CVE Database V5

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Not known to be exploited · CVSS 8.1 High : upgrade to 2.5.4 soon.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade LinkAce and kovah/LinkAce to 2.5.4.

Affected software

ProductAffectedFixed in
KovahLinkAceAffected
  • <2.5.4
Fixed in
  • 2.5.4
GitHubkovah/LinkAcepkg:github/kovah/LinkAceOther threatsAffected
  • <2.5.4
Fixed in
  • 2.5.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Kovah LinkAce to version 2.5.4 or later, where this vulnerability is fixed. Until upgraded, avoid exposing the application to untrusted HTTP headers such as X-Forwarded-Host or implement strict validation of such headers in password reset workflows.

Description

LinkAce is a self-hosted archive to collect website links. Prior to 2.5.4, a password reset poisoning vulnerability was identified in the application due to improper trust of user-controlled HTTP headers. The application uses the X-Forwarded-Host header when generating password reset URLs. By manipulating this header during a password reset request, an attacker can inject an attacker-controlled domain into the reset link sent via email. As a result, the victim receives a password reset email containing a malicious link pointing to an attacker-controlled domain. When the victim clicks the link, the password reset token is transmitted to the attacker-controlled server. An attacker can capture this token and use it to reset the victim’s password, leading to full account takeover. This vulnerability is fixed in 2.5.4.

References

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