---
title: "CVE-2026-28871\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-2026-28871?format=md
keywords: index, follow
---

# CVE-2026-28871

Publication date 25 March 2026

Last updated 6 May 2026

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**4.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-28871?format=md#impact-score)

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## Description

A logic issue was addressed with improved checks. This issue is fixed in
Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS
Tahoe 26.4. Visiting a maliciously crafted website may lead to a cross-site
scripting attack.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2026-28871?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qtwebkit-opensource-src | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 24.04 LTS noble | Ignored |
| 22.04 LTS jammy | Ignored |
| 20.04 LTS focal | Ignored |
| 18.04 LTS bionic | Ignored |
| 16.04 LTS xenial | Ignored |
| qtwebkit-source | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not in release |
| 18.04 LTS bionic | Ignored |
| 16.04 LTS xenial | Ignored |
| webkit2gtk | 26.04 LTS resolute | Fixed 2.52.3-0ubuntu0.26.04.2 |
| 25.10 questing | Fixed 2.52.3-0ubuntu0.25.10.1 |
| 24.04 LTS noble | Fixed 2.52.3-0ubuntu0.24.04.1 |
| 22.04 LTS jammy | Ignored |
| 20.04 LTS focal | Ignored |
| 18.04 LTS bionic | Ignored |
| 16.04 LTS xenial | Ignored |
| webkitgtk | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not in release |
| 18.04 LTS bionic | Ignored |
| 16.04 LTS xenial | Ignored |
| wpewebkit | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Ignored |
| 20.04 LTS focal | Ignored |

---

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

## Notes

---

### [jdstrand](https://launchpad.net/~jdstrand)

webkit receives limited support. For details, see
https://wiki.ubuntu.com/SecurityTeam/FAQ#webkit
webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

It is no longer possible to build new webkit2gtk versions on
focal and earlier. Marking as ignored.
wpewebkit isn't used by anything of importance in the archive,
except for cog, an example container for wpewebkit. There is no
point in attempting to backport newer wpewebkit versions to the
archive. As such, marking as ignored.
It is not feasible to fix webkitgtk, qtwebkit-source, and
qtwebkit-opensource-src. Marking them as ignored.

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

4.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 4.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-28871)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-28871)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-28871)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-28871)

### Related Ubuntu Security Notices (USN)

+ [USN-8237-1](https://usn.ubuntu.com/USN-8237-1)
+ WebKitGTK vulnerabilities
+ 6 May 2026

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-28871>