CVE-2026-57187

HIGH 7.1CVE-2026-57187 · Published 26/10/2026 · updated 02/11/2026

In short

CVE-2026-57187 is a HIGH (CVSS 7.1) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.48%, higher than 42.0% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Description

Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated attacker may cause a heap-use-after-free in `PJSIP TCP/SDP` handling by sending a `SIP INVITE` over a connection-oriented transport and disconnecting before Asterisk responds with the `200 OK`. So far, the crash has only been reproduced when Asterisk is built with `Address Sanitizer`, which detects the issue. `Address Sanitizer` is a development tool with significant performance overhead and, according to the maintainer, is not used in production systems. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.

References

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Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Package

Affected versions

Patched versions

—

No affected product versions are listed for this vulnerability yet.

Description