CVE-2026-4891

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Source
https://cve.org/CVERecord?id=CVE-2026-4891
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4891.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-4891
Downstream
ALPINE (1)
AZL (1)
BELL (1)
CGA (4)
CLEANSTART (2)
CLSA (3)
DEBIAN (1)
MGASA (1)
OESA (5)
openSUSE (2)
RHSA (4)
RLSA (3)
SUSE (6)
UBUNTU (1)
Related
ALSA (3)
CGA (1)
openSUSE (2)
SUSE (6)
Published
2026-05-11T16:47:33Z
Modified
2026-09-02T03:30:50Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
CVE-2026-4891
Details

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

Database specific 
{
    "cna_assigner":  "certcc",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4891.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "fixed":  "2.92rel2"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/pi-hole/ftl

Affected ranges

Type
GIT
Repo
https://github.com/pi-hole/ftl
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
82c58cc45435ddd77875daf368cf64398bc15966
Database specific
Show details 
{
    "source":  "REFERENCES"
}

Affected versions

v1.*
v1.0
v1.1
v1.10
v1.10.1
v1.10.2
v1.10.3
v1.11
v1.11.1
v1.2
v1.2.1
v1.3
v1.3.1
v1.4
v1.5
v1.5.1
v1.6
v1.7
v1.8
v1.9
v2.*
v2.0
v2.1
v2.10
v2.11
v2.11.1
v2.12
v2.13
v2.13.1
v2.13.2
v2.2
v2.3
v2.3.1
v2.4
v2.4.1
v2.5
v2.6
v2.6.1
v2.6.2
v2.7
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.8
v2.9
v2.9.1
v2.9.2
v2.9.3
v2.9.4
v3.*
v3.0
v4.*
v4.0
v4.1
v4.1.1
v4.1.2
v4.2
v4.2.1
v4.2.2
v4.2.3
v4.3
v4.3.1
v5.*
v5.0
v5.1
v5.10
v5.10.1
v5.10.2
v5.11
v5.12
v5.12.1
v5.13
v5.14
v5.15
v5.16
v5.16.1
v5.16.2
v5.16.3
v5.17
v5.18
v5.18.1
v5.18.2
v5.19
v5.19.1
v5.19.2
v5.2
v5.20
v5.20.1
v5.21
v5.22
v5.23
v5.24
v5.25
v5.25.1
v5.25.2
v5.3
v5.3.1
v5.3.2
v5.3.3
v5.3.4
v5.4
v5.5
v5.5.1
v5.6
v5.7
v5.8
v5.8.1
v5.9
v6.*
v6.0
v6.0.1
v6.0.2
v6.0.3
v6.0.4
v6.1
v6.2
v6.2.1
v6.2.2
v6.2.3
v6.3
v6.3.1
v6.3.2
v6.3.3
v6.4.1
v6.5
v6.6
v6.6.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4891.json"