CVE-2026-4893: dnsmasq
CVSS: 5.3v3.1MediumAwaiting analysis
AliasesALPINE-CVE-2026-4893UBUNTU-CVE-2026-4893DEBIAN-CVE-2026-4893CGA-39x9-r3pf-2q4cCGA-8r5w-cf2f-v956CGA-h886-529h-g43xCGA-jhxq-5gxx-v889
Published 11-05-2026Last modified 20-05-2026
Vulnerability summary
CVE-2026-4893 is a medium (CVSS 5.3) vulnerability in dnsmasq. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.4% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)EPSS score
0.58%
0%100%
Low · -1.21 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 7 · Related 4Timeline
- 11-05-2026PublishedVulnerability first disclosed.
- 20-05-2026Last modifiedVulnerability information updated.
Description
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
CVSS metrics
7 scores · 7 sources · 1 versionMedium 5.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NSourcesAll 7 agree
- OSV · AlpineEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · WolfiEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · ChainguardEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.58%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
-1.21 pp
From 1.78% on 19-09-2026
19-09-202619-10-2026
EPSS score0.58%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Chainguard2 products
- dnsmasq< 2.93-r0
- dnsmasq-doc< 2.93-r0
Wolfi2 products
- dnsmasq< 2.93-r0
- dnsmasq-doc< 2.93-r0
Alpine1 product
- dnsmasq< 2.91-r1 | < 2.92_p2-r0
Debian1 product
- dnsmasq< 2.90-4~deb12u2 | < 2.91-1+deb13u1 | < 2.92-5
Dnsmasq1 product
- dnsmasq< 2.92rel2
Ubuntu1 product
- dnsmasq< 2.68-1ubuntu0.2+esm5 | < 2.90-0ubuntu0.16.04.1+esm3 | < 2.90-0ubuntu0.18.04.1+esm3 | < 2.90-0ubuntu0.20.04.1+esm2 | < 2.90-0ubuntu0.22.04.3 | < 2.90-2ubuntu0.3 | < 2.91-1ubuntu0.2 | < 2.92-1ubuntu0.2
6 vendors · 8 products
