CVE-2026-80231
published 2026-09-06CVE-2026-80231: A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting…
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.94%
59.1th percentile
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup
for a given hostname even when using a different Native CA Store setting
(`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
Affected
61 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
| curl | curl | — | — |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
curl libcurl up to 8.21.0 wrong session (EUVD-2026-72169)
vuldb·2026-09-06
CVE-2026-80231 [CRITICAL] curl libcurl up to 8.21.0 wrong session (EUVD-2026-72169)
A vulnerability identified as critical has been detected in curl libcurl. The affected element is an unknown function. Performing a manipulation results in exposure of data element to wrong session.
This vulnerability is identified as CVE-2026-80231. The attack can be initiated remotely. There is not any exploit available.
GHSA
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection w
ghsa_unreviewed·2026-09-06
CVE-2026-80231 A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection w
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup
for a given hostname even when using a different Native CA Store setting
(`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-09-06
Published