CVE-2026-28681
IRRd: web UI host header injection allows password reset poisoning via attacker-controlled email links
Description
Internet Routing Registry daemon version 4 is an IRR database server, processing IRR objects in the RPSL format. From version 4.4.0 to before version 4.4.5 and from version 4.5.0 to before version 4.5.1, an attacker can manipulate the HTTP Host header on a password reset or account creation request. The confirmation link in the resulting email can then point to an attacker-controlled domain. Opening the link in the email is sufficient to pass the token to the attacker, who can then use it on the real IRRD instance to take over the account. A compromised account can then be used to modify RPSL objects maintained by the account's mntners and perform other account actions. If the user had two-factor authentication configured, which is required for users with override access, an attacker is not able to log in, even after successfully resetting the password. This issue has been patched in versions 4.4.5 and 4.5.1.
INFO
Published Date :
March 6, 2026, 5:16 a.m.
Last Modified :
April 21, 2026, 2:45 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-28681
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update IRRD to version 4.4.5 or 4.5.1.
- Verify the confirmation link is not manipulated.
- Ensure strong password policies are enforced.
- Enable two-factor authentication for all users.
Public PoC/Exploit Available at Github
CVE-2026-28681 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-28681.
| URL | Resource |
|---|---|
| https://github.com/irrdnet/irrd/commit/8408e0f1b9f47eb2f2e712d6153e32194df05fbb | Patch |
| https://github.com/irrdnet/irrd/commit/cf62df4a49d3891e80b2879d9b324d1af050000c | Patch |
| https://github.com/irrdnet/irrd/security/advisories/GHSA-22m3-c7vp-49fj | Mitigation Vendor Advisory |
| https://irrd.readthedocs.io/en/stable/releases/4.4.5 | Release Notes |
| https://irrd.readthedocs.io/en/stable/releases/4.5.1 | Release Notes |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-28681 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-2026-28681
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).
AIGCVE 神龙精选 CVE 中文情报榜（每周自动更新，原站 cve.imfht.com）
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-28681 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-28681 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.
-
Initial Analysis by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:internet_routing_registry_daemon_project:internet_routing_registry_daemon:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (excluding) 4.4.5 *cpe:2.3:a:internet_routing_registry_daemon_project:internet_routing_registry_daemon:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.5.1 Added Reference Type GitHub, Inc.: https://github.com/irrdnet/irrd/commit/8408e0f1b9f47eb2f2e712d6153e32194df05fbb Types: Patch Added Reference Type GitHub, Inc.: https://github.com/irrdnet/irrd/commit/cf62df4a49d3891e80b2879d9b324d1af050000c Types: Patch Added Reference Type GitHub, Inc.: https://github.com/irrdnet/irrd/security/advisories/GHSA-22m3-c7vp-49fj Types: Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://irrd.readthedocs.io/en/stable/releases/4.4.5 Types: Release Notes Added Reference Type GitHub, Inc.: https://irrd.readthedocs.io/en/stable/releases/4.5.1 Types: Release Notes -
New CVE Received by [email protected]
Mar. 06, 2026
Action Type Old Value New Value Added Description Internet Routing Registry daemon version 4 is an IRR database server, processing IRR objects in the RPSL format. From version 4.4.0 to before version 4.4.5 and from version 4.5.0 to before version 4.5.1, an attacker can manipulate the HTTP Host header on a password reset or account creation request. The confirmation link in the resulting email can then point to an attacker-controlled domain. Opening the link in the email is sufficient to pass the token to the attacker, who can then use it on the real IRRD instance to take over the account. A compromised account can then be used to modify RPSL objects maintained by the account's mntners and perform other account actions. If the user had two-factor authentication configured, which is required for users with override access, an attacker is not able to log in, even after successfully resetting the password. This issue has been patched in versions 4.4.5 and 4.5.1. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Added CWE CWE-640 Added CWE CWE-601 Added Reference https://github.com/irrdnet/irrd/commit/8408e0f1b9f47eb2f2e712d6153e32194df05fbb Added Reference https://github.com/irrdnet/irrd/commit/cf62df4a49d3891e80b2879d9b324d1af050000c Added Reference https://github.com/irrdnet/irrd/security/advisories/GHSA-22m3-c7vp-49fj Added Reference https://irrd.readthedocs.io/en/stable/releases/4.4.5 Added Reference https://irrd.readthedocs.io/en/stable/releases/4.5.1