Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-100890
Trusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode null pointer dereference
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N N N N N L 5.5 .0037 28.9 —
AFFECTED
Product Versions Fixed
OpenDMARC 1.4.0 – —
TIMELINE
Sep 27 Reserved by VulDB
Sep 28 EXPLOIT PUBLISHED — CVE-2026-100890 (Trusted Domain Project OpenDMARC). Public exploit reference added.
Sep 28 Published (CNA: VulDB)
Description
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the component SPF Parser. This manipulation of the argument cp causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| September 27, 2026 | Reserved | Reserved by VulDB |
| September 28, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-100890 (Trusted Domain Project OpenDMARC). Public exploit reference added. |
| September 28, 2026 | Published | Published (CNA: VulDB) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Trusted Domain Project | OpenDMARC | — | 1.4.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-100890 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
