CVE•Published 2026-09-28•Modified 2026-10-01•0 articles on news•4 live references•NVD data
CVE-2026-100891
Vulnerability data via NVD (ingested)
CVSS v3.1
7.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS percentile
20
Exploit Prediction Scoring System · top 80% of all CVEs
Weaknesses (CWE)
Description
A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_policy_query_dmarc in the library libopendmarc/opendmarc_policy.c of the component Internationalized Domain Name Handler. Such manipulation leads to encoding error. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Timeline
Published 2026-09-28
Modified 2026-10-01
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-100891Hosts Shodan has explicitly fingerprinted as vulnerable.
More intel sources (5)
Shodan report
vuln:CVE-2026-100891Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-100891Censys host search filtered to this CVE id.
grep.app
CVE-2026-100891Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-100891GitHub code search for direct mentions.
Google dork
"CVE-2026-100891" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-100891 on GitHub.
We haven't classified any articles referencing CVE-2026-100891 yet. The external references above still apply.