Vulnerability

CVE-2025-14819

Low· 5.3CVSS5.3EPSS0%

.rules3/5

curl/libcurl: OpenSSL partial chain store policy bypass

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.

Threat signal

53/100

Elevated

Severity

low

CVSS

5.3

EPSS

Active

CVSS

v3.1via NVDOpen in FIRST calculator →

5.3/ 10MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityHighRequires conditions outside attacker's control (race, brute-force, configuration
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionRequiredRequires user action (click, file open, etc).
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactNoneNo integrity impact.
Availability ImpactNoneNo availability impact.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

0.03%

probability of exploitation in next 30 days

higher than 9% of all CVEs

3-day trend↑ 0pp

Low exploitation likelihood — defer if no other signals fire.

Vendor VEX

No VEX statements published for CVE-2025-14819. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCDefer

No exploitation, limited impact or prevalence

exploitation: none
automatable: no
impact: partial
mission: support

Lifecycle

2026-01-07Published
2026-02-19Vendor advisory · amazon-linuxALAS2-2026-3173 — ALAS2-2026-3173 (medium): curl
2026-05-19Last modified2 sources

Entity graph

2 nodes · 1 edges · click to pivot

CVEActorVendor advisoryIOCNews

Vendor advisories

amazon-linuxALAS2-2026-3173ALAS2-2026-3173 (medium): curl

References

https://curl.se/docs/CVE-2025-14819.html

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.