Description
Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Exim | Exim | 4.82 – < 4.99.5 | 4.99.5 |
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 | exim4 | 4.99.4-2 | — |
| Debian 13 | exim4 | 4.98.2-1+deb13u4 | — |
| Debian 12 | exim4 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | exim4 | 4.99.1-1ubuntu1.4 | — |
| Ubuntu 24.04 LTS | exim4 | 4.97-4ubuntu4.7 | — |
| Ubuntu 22.04 LTS | exim4 | 4.95-4ubuntu2.11 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | exim4 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | exim4 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | exim4 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | exim4 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | exim | 4.98.5-r0 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | exim +9 | 4.99.5-r0 | — |
Advisories 1
- WID-SEC-2026-2494 Exim: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 26, 2026