# CVE-2026-10536

## Summary

- **CVE ID:** CVE-2026-10536
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-416
- **Published:** Jul 3, 2026
- **Last Modified:** Sep 15, 2026

## Description

A use-after-free vulnerability exists in libcurl when an application
configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or
`CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and
finally terminates the handle with `curl_easy_cleanup()`. During this final
cleanup phase, libcurl attempts to access and modify an internal structure
that was already freed during the reset operation.

## Affected Products

- curl — curl (8.20.0)
- curl — curl (8.19.0)
- curl — curl (8.18.0)
- curl — curl (8.17.0)
- curl — curl (8.16.0)
- curl — curl (8.15.0)
- curl — curl (8.14.1)
- curl — curl (8.14.0)
- curl — curl (8.13.0)
- curl — curl (8.12.1)
- curl — curl (8.12.0)
- curl — curl (8.11.1)
- curl — curl (8.11.0)
- curl — curl (8.10.1)
- curl — curl (8.10.0)
- curl — curl (8.9.1)
- curl — curl (8.9.0)
- curl — curl (8.8.0)
- curl — curl (8.7.1)
- curl — curl (8.7.0)
- curl — curl (8.6.0)
- curl — curl (8.5.0)
- curl — curl (8.4.0)
- curl — curl (8.3.0)
- curl — curl (8.2.1)
- curl — curl (8.2.0)
- curl — curl (8.1.2)
- curl — curl (8.1.1)
- curl — curl (8.1.0)
- curl — curl (8.0.1)
- curl — curl (8.0.0)
- curl — curl (7.88.1)
- curl — curl (7.88.0)
- curl — curl (71b7e0161032927cdfb4e75ea40f65b8898b3956)

## References

- [CNA](https://curl.se/docs/CVE-2026-10536.json)
- [CNA](https://curl.se/docs/CVE-2026-10536.html)
- [CNA](https://hackerone.com/reports/3751697)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.60%
- **EPSS Percentile:** 47.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._