---
title: "CVE-2023-28628\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-28628?format=md
keywords: index, follow
---

# CVE-2023-28628

Publication date 27 March 2023

Last updated 6 April 2026

---

Ubuntu priority

**High**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**5.4 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2023-28628?format=md#impact-score)

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## Description

lambdaisland/uri is a pure Clojure/ClojureScript URI library. In versions
prior to 1.14.120 `authority-regex` allows an attacker to send malicious
URLs to be parsed by the `lambdaisland/uri` and return the wrong authority.
This issue is similar to but distinct from CVE-2020-8910. The regex in
question doesn't handle the backslash (`\`) character in the username
correctly, leading to a wrong output. ex. a payload of
`https://example.com\\@google.com` would return that the host is
`google.com`, but the correct host should be `example.com`. Given that the
library returns the wrong authority this may be abused to bypass host
restrictions depending on how the library is used in an application. Users
are advised to upgrade. There are no known workarounds for this
vulnerability.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| lambdaisland-uri-clojure | 26.04 LTS resolute | Vulnerable |
| 25.10 questing | Ignored end of life, was needed |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Fixed 1.13.95-2ubuntu0.24.04.1~esm2  Ubuntu Pro |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Fixed 1.13.95-2ubuntu0.22.04.1~esm1  Ubuntu Pro |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

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## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.4 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | Required |
  | Scope | Unchanged |
  | Confidentiality impact | Low |
  | Integrity impact | Low |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.4 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-28628)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-28628)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-28628)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-28628)

### Related Ubuntu Security Notices (USN)

+ [USN-8151-1](https://usn.ubuntu.com/USN-8151-1)
+ lambdaisland/uri vulnerability
+ 6 April 2026

### Other references

* <https://github.com/lambdaisland/uri/security/advisories/GHSA-cp4w-6x4w-v2h5>
* <https://github.com/lambdaisland/uri/commit/f46db3e84846f79e14bfee0101d9c7a872321820>
* <https://www.cve.org/CVERecord?id=CVE-2023-28628>