What is CVE-2026-8925?

CVE-2026-8925 is a critical-severity vulnerability in Curl, classified under Double Free. CVSS score: 9.8/10. Published 2026-07-03.

How severe is CVE-2026-8925?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Double Free in Curl

CVE-2026-8925

The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing the pointer in between, making it `free()` the same pointer twice.

Vulnerability class: Double Free

Published 2026-07-03 · last modified 2026-09-15.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.8th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.011 · change: +0.004

Affected products

Curl — versions 8.20.0, 8.19.0, 8.18.0
Haxx Curl

Weakness classification (CWE)

CWE-415 — Double Free

References

2499f714-1537-4658-8207-48ae4bb9eae9 (Vendor Advisory)
2499f714-1537-4658-8207-48ae4bb9eae9 (Patch, Vendor Advisory)
2499f714-1537-4658-8207-48ae4bb9eae9 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2026-8925?: CVE-2026-8925 is a critical-severity vulnerability in Curl, classified under Double Free. CVSS score: 9.8/10. Published 2026-07-03.
How severe is CVE-2026-8925?: Critical severity. CVSS v3 base score is 9.8 out of 10.