How severe is CVE-2019-17513?

CVE-2019-17513 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 high, and availability none.

Is CVE-2019-17513 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17513?

CVE-2019-17513 affects Ratpack Project Ratpack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17513?

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-2019-17513 published?

CVE-2019-17513 was published on 2019-10-18 and last updated on 2026-06-17.

CVE-2019-17513

CVE-2019-17513 is a high-severity vulnerability in Ratpack Project Ratpack 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-74.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Ratpack Project Ratpack
Published: 2019-10-18
Last modified: 2026-06-17

Description

An issue was discovered in Ratpack before 1.7.5. Due to a misuse of the Netty library class DefaultHttpHeaders, there is no validation that headers lack HTTP control characters. Thus, if untrusted data is used to construct HTTP headers with Ratpack, HTTP Response Splitting can occur.

Frequently asked questions

What is CVE-2019-17513?: An issue was discovered in Ratpack before 1.7.5. Due to a misuse of the Netty library class DefaultHttpHeaders, there is no validation that headers lack HTTP control characters. Thus, if untrusted data is used to construct HTTP headers with Ratpack, HTTP Response Splitting can occur.
How severe is CVE-2019-17513?: CVE-2019-17513 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 high, and availability none.
Is CVE-2019-17513 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17513?: CVE-2019-17513 affects Ratpack Project Ratpack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17513?: 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-2019-17513 published?: CVE-2019-17513 was published on 2019-10-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ratpack_project:ratpack:*:*:*:*:*:*:*:*

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