Medium severity5.3NVD Advisory· Published May 30, 2026· Updated Jul 22, 2026
CVE-2026-48840
CVE-2026-48840
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
23- osv-coords20 versionspkg:apk/chainguard/eximpkg:apk/chainguard/exim-cdbpkg:apk/chainguard/exim-dbmdbpkg:apk/chainguard/exim-dnsdbpkg:apk/chainguard/exim-docpkg:apk/chainguard/exim-mysqlpkg:apk/chainguard/exim-pgsqlpkg:apk/chainguard/exim-scriptspkg:apk/chainguard/exim-sqlitepkg:apk/chainguard/exim-utilspkg:apk/wolfi/eximpkg:apk/wolfi/exim-cdbpkg:apk/wolfi/exim-dbmdbpkg:apk/wolfi/exim-dnsdbpkg:apk/wolfi/exim-docpkg:apk/wolfi/exim-mysqlpkg:apk/wolfi/exim-pgsqlpkg:apk/wolfi/exim-scriptspkg:apk/wolfi/exim-sqlitepkg:apk/wolfi/exim-utils
< 4.99.5-r0+ 19 more
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
- (no CPE)range: < 4.99.5-r0
Patches
Vulnerability mechanics
References
4- www.openwall.com/lists/oss-security/2026/05/29/3nvdMailing ListMitigationThird Party Advisory
- exim.org/static/doc/security/EXIM-Security-2026-05-19.1nvdVendor Advisory
- www.openwall.com/lists/oss-security/2026/05/29/3nvdMailing ListMitigationThird Party Advisory
- lists.debian.org/debian-lts-announce/2026/06/msg00004.htmlnvd
News mentions
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