Medium severity4.8NVD Advisory· Published Apr 30, 2026· Updated May 1, 2026
CVE-2026-40687
CVE-2026-40687
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 products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- code.exim.org/exim/exim/commit/68b963b9f75ca27b38e1c0f8c87037990199f505nvdPatch
- exim.org/static/doc/security/cve-2026-04.1/CVE2026-40687.assessmentnvdVendor Advisory
- www.openwall.com/lists/oss-security/2026/04/30/21nvdMailing ListThird Party Advisory
- exim.org/static/doc/security/CVE-2026-40687.txtnvdBroken Link
News mentions
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