How severe is CVE-2018-16131?

CVE-2018-16131 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-16131 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16131?

CVE-2018-16131 affects Lightbend Akka Http. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16131?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-16131 published?

CVE-2018-16131 was published on 2018-08-30 and last updated on 2026-06-17.

CVE-2018-16131

CVE-2018-16131 is a high-severity vulnerability in Lightbend Akka Http with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Lightbend Akka Http
Published: 2018-08-30
Last modified: 2026-06-17

Description

The decodeRequest and decodeRequestWith directives in Lightbend Akka HTTP 10.1.x through 10.1.4 and 10.0.x through 10.0.13 allow remote attackers to cause a denial of service (memory consumption and daemon crash) via a ZIP bomb.

Frequently asked questions

What is CVE-2018-16131?: The decodeRequest and decodeRequestWith directives in Lightbend Akka HTTP 10.1.x through 10.1.4 and 10.0.x through 10.0.13 allow remote attackers to cause a denial of service (memory consumption and daemon crash) via a ZIP bomb.
How severe is CVE-2018-16131?: CVE-2018-16131 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-16131 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16131?: CVE-2018-16131 affects Lightbend Akka Http. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16131?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-16131 published?: CVE-2018-16131 was published on 2018-08-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lightbend:akka_http:*:*:*:*:*:*:*:*

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