Description
When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | xdg-utils | xdg-utils 1.1.0 to and including 1.1.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xdg-utils | No fix yet | — |
| Debian 13 | xdg-utils | No fix yet | — |
| Debian 12 | xdg-utils | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | xdg-utils | No fix yet | — |
| Ubuntu 26.04 LTS | xdg-utils | No fix yet | — |
| Ubuntu 25.10 | xdg-utils | No fix yet | — |
| Ubuntu 24.04 LTS | xdg-utils | No fix yet | — |
| Ubuntu 22.04 LTS | xdg-utils | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xdg-utils | No fix yet | — |
| Ubuntu 18.04 LTS | xdg-utils | No fix yet | — |
| Ubuntu 16.04 LTS | xdg-utils | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | xdg-utils | 1.1.3-13.el9_6 | RHSA-2025:7672 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | xdg-utils | 1.1.3-13.el9_6 | ALSA-2025:7672 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | xdg-utils | 1.1.3-13.el9_6 | RLSA-2025:7672 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | xdg-utils | 1.1.3-12.amzn2023.0.1 | ALAS2023-2023-007 |
| Amazon Linux 2 | xdg-utils | 1.1.0-0.17.20120809git.amzn2.0.1 | ALAS2-2023-2002 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | xdg-utils | 1.2.1-3 | — |
| Azure Linux 2 (CBL-Mariner) | xdg-utils | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | xdg-utils | 1.1.3-13.el9_6 | ELSA-2025-7672 |
Advisories 7
- ALSA-2025:7672 Moderate: xdg-utils security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:7672 Red Hat Security Advisory: xdg-utils security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RLSA-2025:7672 Moderate: xdg-utils security update Rocky Linux Security Advisories · Oct 7, 2025
- WID-SEC-2025-1074 Red Hat Enterprise Linux (xdg-utils): Schwachstelle ermöglicht Umgehung von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · May 22, 2025
- ELSA-2025-7672 Moderate: xdg-utils security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 22, 2025
- ALAS2-2023-2002 Moderate: xdg-utils security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 21, 2023
- ALAS2023-2023-007 Moderate: xdg-utils security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 23, 2023