Is there a public exploit for CVE-2023-27537?

No public exploit for CVE-2023-27537 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

What does CVE-2023-27537 affect?

CVE-2023-27537 affects n/a https://github.com/curl/curl.

— Unscored

A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles".

CVE-2023-27537

A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.

Assessment

CVSS: Not yet scored
Severity: Unscored
EPSS: 1.9% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 March 2023
Last updated: 2 November 2026
Affected: n/a · https://github.com/curl/curl
Assigner: hackerone

At the source

EUVD (ENISA)

References

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