What is CVE-2026-48187?

CVE-2026-48187 is a medium-severity vulnerability in Otrs, classified under Uncontrolled Resource Consumption. CVSS score: 5.7/10. Published 2026-06-01.

How severe is CVE-2026-48187?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Resource exhaustion in Otrs

CVE-2026-48187

An uncontrolled allocation of resources without limits or throttling in the e-mail handling in OTRS allows excessive allocation which may lead to the abortion of the webserver.This issue affects OTRS: * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.4.X Please note that ((OTRS)) Community Edition 6.x, OTRS 7.x and products based on the ((OTRS)) Community Edition also very likely to be affected

Vulnerability class: DoS (Denial of Service)

Published 2026-06-01 · last modified 2026-07-22.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (27.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Otrs
Otrs Ag — versions 7.0.x, 8.0.x, 2023.x
Otrs Ag ((Otrs)) Community Edition — versions 6.x

Weakness classification (CWE)

References

otrs.com/release-notes/otrs-security-advisory-2026-06/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-48187?: CVE-2026-48187 is a medium-severity vulnerability in Otrs, classified under Uncontrolled Resource Consumption. CVSS score: 5.7/10. Published 2026-06-01.
How severe is CVE-2026-48187?: Medium severity. CVSS v3 base score is 5.7 out of 10.