CVE-2026-8925 Details
Description
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.
A double-free vulnerability has been identified in curl's handling of SASL authentication. This issue arises because the GSASL context can be cleaned up twice without properly nullifying the pointer in between, leading to the same pointer being freed twice. The vulnerability affects curl versions 8.15.0 through 8.20.0, when built with libgsasl support. It can be triggered during IMAP, POP3, or SMTP sessions by manipulating the SASL authentication mechanism.
Users are advised to upgrade curl to version 8.21.0, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://hackerone.com/reports/3735193 | CISA-ADP | ExploitIssue TrackingThird Party Advisory |
| https://curl.se/docs/CVE-2026-8925.html | curl | PatchVendor Advisory |
| https://curl.se/docs/CVE-2026-8925.json | curl | Vendor Advisory |
| https://hackerone.com/reports/3735193 | curl | ExploitIssue TrackingThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-415 | Double Free | [email protected] |
| CWE-415 | Double Free | curl |
Affected Products
| Product | Versions |
|---|---|
| haxx curl | >= 8.15.0, < 8.21.0 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 15, 2026 | CVE Modified | curl |
| Sep 15, 2026 | CVE Modified | CISA-ADP |
| Jul 7, 2026 | Initial Analysis | [email protected] |
| Jul 6, 2026 | CVE Modified | CISA-ADP |
| Jul 3, 2026 | New CVE Received | curl |