How severe is CVE-2026-48187?

CVE-2026-48187 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-48187 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48187?

CVE-2026-48187 primarily affects Otrs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-48187?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-48187 have an EU (EUVD) identifier?

Yes. CVE-2026-48187 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33553.

When was CVE-2026-48187 published?

CVE-2026-48187 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-48187

CVE-2026-48187 is a medium-severity vulnerability in Otrs with a CVSS 3.x base score of 5.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.7)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33553
Weakness: CWE-400
Affected product: Otrs
Published: 2026-06-01
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is 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
How severe is CVE-2026-48187?: CVE-2026-48187 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-48187 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-48187?: CVE-2026-48187 primarily affects Otrs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-48187?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-48187 have an EU (EUVD) identifier?: Yes. CVE-2026-48187 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33553.
When was CVE-2026-48187 published?: CVE-2026-48187 was published on 2026-06-01 and last updated on 2026-06-17.

References

https://otrs.com/release-notes/otrs-security-advisory-2026-06/

Affected products (2)

cpe:2.3:a:otrs:otrs:*:*:*:*:community:*:*:*
cpe:2.3:a:otrs:otrs:*:*:*:*:*:*:*:*

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