How severe is CVE-2025-14819?

CVE-2025-14819 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-14819 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14819?

CVE-2025-14819 affects Haxx Curl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-14819?

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

Does CVE-2025-14819 have an EU (EUVD) identifier?

Yes. CVE-2025-14819 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1566.

When was CVE-2025-14819 published?

CVE-2025-14819 was published on 2026-01-08 and last updated on 2026-06-17.

CVE-2025-14819

CVE-2025-14819 is a medium-severity vulnerability in Haxx Curl 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1566
Weakness: CWE-295
Affected product: Haxx Curl
Published: 2026-01-08
Last modified: 2026-06-17

Description

When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcurl find and accept a trust chain that it otherwise would not.

Frequently asked questions

What is CVE-2025-14819?: When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcurl find and accept a trust chain that it otherwise would not.
How severe is CVE-2025-14819?: CVE-2025-14819 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-14819 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14819?: CVE-2025-14819 affects Haxx Curl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-14819?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-14819 have an EU (EUVD) identifier?: Yes. CVE-2025-14819 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1566.
When was CVE-2025-14819 published?: CVE-2025-14819 was published on 2026-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

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