How severe is CVE-2019-17640?

CVE-2019-17640 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-17640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17640?

CVE-2019-17640 primarily affects Eclipse Vert.x. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-17640?

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

When was CVE-2019-17640 published?

CVE-2019-17640 was published on 2020-10-15 and last updated on 2026-06-17.

CVE-2019-17640

CVE-2019-17640 is a critical-severity vulnerability in Eclipse Vert.x with a CVSS 3.x base score of 9.8. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Eclipse Vert.x
Published: 2020-10-15
Last modified: 2026-06-17

Description

In Eclipse Vert.x 3.4.x up to 3.9.4, 4.0.0.milestone1, 4.0.0.milestone2, 4.0.0.milestone3, 4.0.0.milestone4, 4.0.0.milestone5, 4.0.0.Beta1, 4.0.0.Beta2, and 4.0.0.Beta3, StaticHandler doesn't correctly processes back slashes on Windows Operating systems, allowing, escape the webroot folder to the current working directory.

Frequently asked questions

What is CVE-2019-17640?: In Eclipse Vert.x 3.4.x up to 3.9.4, 4.0.0.milestone1, 4.0.0.milestone2, 4.0.0.milestone3, 4.0.0.milestone4, 4.0.0.milestone5, 4.0.0.Beta1, 4.0.0.Beta2, and 4.0.0.Beta3, StaticHandler doesn't correctly processes back slashes on Windows Operating systems, allowing, escape the webroot folder to the current working directory.
How severe is CVE-2019-17640?: CVE-2019-17640 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-17640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17640?: CVE-2019-17640 primarily affects Eclipse Vert.x. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-17640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-17640 published?: CVE-2019-17640 was published on 2020-10-15 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:milestone1:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:milestone2:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:milestone3:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:milestone4:*:*:*:*:*:*
cpe:2.3:a:eclipse:vert.x:4.0.0:milestone5:*:*:*:*:*:*

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