CVE-2026-48840 | THREATINT

Description

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.

PUBLISHED Reserved 2026-05-25 | Published 2026-05-30 | Updated 2026-05-30 | Assigner mitre

MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-839 Numeric Range Comparison Without Minimum Check

Product status

Default status
unaffected

4.88 (custom) before 4.99.4
affected

References

exim.org/static/doc/security/EXIM-Security-2026-05-19.1

www.openwall.com/lists/oss-security/2026/05/29/3

cve.org (CVE-2026-48840)

nvd.nist.gov (CVE-2026-48840)

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