critical
CVE-2026-40687
In Exim before 4.99.2, when the SPA authentication driver is used with ...
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).
Description
In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.23 | exim | 4.98.2-r0 |
| alpine 3.24 | exim | 4.98.2-r0 |
| alpine edge | exim | 4.98.2-r0 |
| chainguard | exim | 4.99.5-r0 |
| debian 11 | exim4 | no fix listed |
| debian 12 | exim4 | 4.96-15+deb12u9 |
| debian 13 | exim4 | 4.98.2-1+deb13u2 |
| debian 14 | exim4 | 4.99.2-1 |
| echo | exim4 | 4.96-15+deb12u9 |
| rapidfort debian 12 | exim4 | 0:4.98.2-1+deb13u2, 0:4.99.2-1 |
| rapidfort debian 13 | exim4 | 0:4.98.2-1+deb13u2, 0:4.99.2-1 |
| rapidfort fedora 43 | exim, exim-clamav, exim-greylist and 3 more | 4.99.2-1.fc43 |
Show all 38 entries from 23 sources
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.23 | exim | 4.98.2-r0 |
| alpine 3.24 | exim | 4.98.2-r0 |
| alpine edge | exim | 4.98.2-r0 |
| chainguard | exim | 4.99.5-r0 |
| debian 11 | exim4 | no fix listed |
| debian 12 | exim4 | 4.96-15+deb12u9 |
| debian 13 | exim4 | 4.98.2-1+deb13u2 |
| debian 14 | exim4 | 4.99.2-1 |
| echo | exim4 | 4.96-15+deb12u9 |
| rapidfort debian 12 | exim4 | 0:4.98.2-1+deb13u2, 0:4.99.2-1 |
| rapidfort debian 13 | exim4 | 0:4.98.2-1+deb13u2, 0:4.99.2-1 |
| rapidfort fedora 43 | exim | 4.99.2-1.fc43 |
| rapidfort fedora 43 | exim-clamav | 4.99.2-1.fc43 |
| rapidfort fedora 43 | exim-greylist | 4.99.2-1.fc43 |
| rapidfort fedora 43 | exim-mon | 4.99.2-1.fc43 |
| rapidfort fedora 43 | exim-mysql | 4.99.2-1.fc43 |
| rapidfort fedora 43 | exim-pgsql | 4.99.2-1.fc43 |
| rapidfort Oracle Linux 10 | exim | 4.99.2-1.el10_3 |
| rapidfort Oracle Linux 10 | exim-clamav | 4.99.2-1.el10_3 |
| rapidfort Oracle Linux 10 | exim-greylist | 4.99.2-1.el10_3 |
| rapidfort Oracle Linux 10 | exim-mon | 4.99.2-1.el10_3 |
| rapidfort Oracle Linux 10 | exim-mysql | 4.99.2-1.el10_3 |
| rapidfort Oracle Linux 10 | exim-pgsql | 4.99.2-1.el10_3 |
| rapidfort Oracle Linux 9 | exim | 4.99.2-1.el9 |
| rapidfort Oracle Linux 9 | exim-clamav | 4.99.2-1.el9 |
| rapidfort Oracle Linux 9 | exim-greylist | 4.99.2-1.el9 |
| rapidfort Oracle Linux 9 | exim-mon | 4.99.2-1.el9 |
| rapidfort Oracle Linux 9 | exim-mysql | 4.99.2-1.el9 |
| rapidfort Oracle Linux 9 | exim-pgsql | 4.99.2-1.el9 |
| rapidfort ubuntu 20.04 | exim4 | 0:4.95-4ubuntu2.7, 0:4.97-4ubuntu4.4, 0:4.99.1-1ubuntu1.1 |
| rapidfort ubuntu 22.04 | exim4 | 0:4.95-4ubuntu2.7, 0:4.97-4ubuntu4.4, 0:4.99.1-1ubuntu1.1 |
| rapidfort ubuntu 24.04 | exim4 | 0:4.95-4ubuntu2.7, 0:4.97-4ubuntu4.4, 0:4.99.1-1ubuntu1.1 |
| ubuntu 20.04-ESM | exim4 | 4.93-13ubuntu1.12+esm1 |
| ubuntu 22.04 | exim4 | 4.95-4ubuntu2.7 |
| ubuntu 24.04 | exim4 | 4.97-4ubuntu4.4 |
| ubuntu 25.10 | exim4 | 4.98.2-1ubuntu2.1 |
| ubuntu 26.04 | exim4 | 4.99.1-1ubuntu1.1 |
| wolfi | exim | 4.99.5-r0 |
References
- https://code.exim.org/exim/exim/commit/68b963b9f75ca27b38e1c0f8c87037990199f505
- https://exim.org/static/doc/security/CVE-2026-40687.txt
- https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40687.assessment
- https://lists.exim.org/lurker/message/20260429.121733.f58d9686.en.html
- https://ubuntu.com/security/notices/USN-8228-1
- https://ubuntu.com/security/notices/USN-8382-1
- https://www.cve.org/CVERecord?id=CVE-2026-40687
- https://www.openwall.com/lists/oss-security/2026/04/30/21