What is CVE-2026-102490?
Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file system write privileges as the unprivileged zammad service account to escalate to full root privileges on the host. Service processes began running as root and executed files that were owned and writable by the zammad account before dropping their identity to that account. An attacker holding that foothold could have escalated within seconds, because the affected services were restarted automatically whenever they stopped; no administrator interaction was required. Only installations from the DEB and RPM packages were affected — installations from source or the official container images were not. All released packaged versions were affected.
The record classifies CVE-2026-102490 under weakness class CWE-269. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 24 days ago.
Severity and exploitation probability
- CVSS v4.0 base score
- 8.5 — High (derived from score)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/AU:Y/V:D - EPSS (FIRST)
- 0.5% probability of exploitation in the next 30 days, higher than 44.3% of all scored CVEs
- CISA KEV
- Listed since 2026-10-02, federal remediation deadline 2026-10-05
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-09-30, last modified 2026-10-08
Is CVE-2026-102490 being exploited?
CISA added CVE-2026-102490 to the Known Exploited Vulnerabilities catalog on 2026-10-02, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-10-05 under BOD 22-01. It currently carries a trending score of 54 in the Threadlinqs vulnerability feed.
Affected products and versions
- Zammad GmbH: Zammad
How to fix CVE-2026-102490
Because CVE-2026-102490 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-10-05. No vendor patch reference has been recorded for CVE-2026-102490 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-102490
1 tracked threat in the Threadlinqs corpus references CVE-2026-102490, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories. Last verified by Threadlinqs on .