5.3

CVE-2025-14819: OpenSSL partial chain store policy bypass

Modified
AliasesALPINE-CVE-2025-14819UBUNTU-CVE-2025-14819DEBIAN-CVE-2025-14819
Published 08-01-2026Last modified 15-09-2026

Vulnerability summary

CVE-2025-14819 is a medium (CVSS 5.3) Improper Certificate Validation vulnerability in curl. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 55.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.76%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 12
CVE-2026-92392MGASA-2026-0003OPENSUSE-SU-2026:10017-1OPENSUSE-SU-2026:20031-1RHSA-2026:55450RHSA-2026:6893

Timeline

  1. 08-01-2026
    PublishedVulnerability first disclosed.
  2. 15-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.76%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.76% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • curl≥ 7.87.0, < 8.14.1-r3 | ≥ 7.87.0, < 8.14.1-r4 | ≥ 7.87.0, < 8.18.0-r0
Chainguard1 product
  • libcurl4All versions (No fix recorded)
Curl1 product
  • curl≥ 7.87.0, < 8.14.2 | ≥ 8.15.0, < 8.16.1 | ≥ 8.17.0, < 8.18.0 | ≥ 3c16697ebd796f799227be293e8689aec5f8190d, < cd046f6c93b39d673a58c18648d8906e954c4f5d | 8.17.0 | 8.16.0 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | 8.12.1 | 8.12.0 | 8.11.1 | 8.11.0 | 8.10.1 | 8.10.0 | 8.9.1 | 8.9.0 | 8.8.0 | 8.7.1 | 8.7.0 | 8.6.0 | 8.5.0 | 8.4.0 | 8.3.0 | 8.2.1 | 8.2.0 | 8.1.2 | 8.1.1 | 8.1.0 | 8.0.1 | 8.0.0 | 7.88.1 | 7.88.0 | 7.87.0
Debian1 product
  • curl< 7.88.1-10+deb12u15 | < 8.14.1-2+deb13u4 | < 8.18.0~rc3-1
Haxx1 product
  • curl≥ 7.87.0, < 8.18.0
Ubuntu1 product
  • curl< 8.5.0-2ubuntu10.7 | < 8.14.1-2ubuntu1.1
Wolfi1 product
  • libcurl4All versions (No fix recorded)

7 vendors · 7 products

References

8 links