CVE-2026-48840

5.3 MEDIUM

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

Published: 2026-05-30 · Last updated: 2026-06-05

Severity and scoring

CVSS: 5.3 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE: CWE-839

Affected products

Vendor	Product
exim	exim

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-48840
[Vendor advisory]https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1
[Other]https://www.openwall.com/lists/oss-security/2026/05/29/3
[Other]http://www.openwall.com/lists/oss-security/2026/05/29/3
[Other]https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html

Related CVEs

Same vendor

CVE-2026-45185 — Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path (9.8 CRITICAL)