How severe is CVE-2019-19240?

CVE-2019-19240 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-19240 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19240?

CVE-2019-19240 affects Embedthis Goahead. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19240?

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

When was CVE-2019-19240 published?

CVE-2019-19240 was published on 2019-11-22 and last updated on 2026-06-17.

CVE-2019-19240

CVE-2019-19240 is a medium-severity vulnerability in Embedthis Goahead with a CVSS 3.x base score of 5.3. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Embedthis Goahead
Published: 2019-11-22
Last modified: 2026-06-17

Description

Embedthis GoAhead before 5.0.1 mishandles redirected HTTP requests with a large Host header. The GoAhead WebsRedirect uses a static host buffer that has a limited length and can overflow. This can cause a copy of the Host header to fail, leaving that buffer uninitialized, which may leak uninitialized data in a response.

Frequently asked questions

What is CVE-2019-19240?: Embedthis GoAhead before 5.0.1 mishandles redirected HTTP requests with a large Host header. The GoAhead WebsRedirect uses a static host buffer that has a limited length and can overflow. This can cause a copy of the Host header to fail, leaving that buffer uninitialized, which may leak uninitialized data in a response.
How severe is CVE-2019-19240?: CVE-2019-19240 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-19240 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19240?: CVE-2019-19240 affects Embedthis Goahead. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19240?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-19240 published?: CVE-2019-19240 was published on 2019-11-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:*

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