# CVE-2026-108822: Kamailio sipt module buffer overflow in ISUP parser

Source: https://junglewise.ai/threats/cve-2026-108822-a-vulnerability-was-detected-in-kamailio-up-to-6-0-7-6-1-3-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108822 · Severity: medium · CVSS 5.3 · Published 2026-10-12

Kamailio is an open-source SIP server used to route and manage real-time communication traffic. A buffer overflow vulnerability in its ISUP message parsing component allows remote attackers to crash the service or potentially execute arbitrary code by sending a specially crafted SIP message. This could result in service disruption or compromise of the VoIP platform.

Technologies: [Kamailio](https://junglewise.ai/threats/technologies/kamailio). Vendors: [Kamailio](https://junglewise.ai/threats/vendors/kamailio).

## Quick answers

**Is CVE-2026-108822 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108822 being exploited in the wild.

**How severe is CVE-2026-108822?** Medium severity, with a CVSS score of 5.3, published 12 October 2026.

**Which products and versions are affected?** Kamailio up to 6.0.7, 6.1.3.

**Is there a fix for CVE-2026-108822?** Yes: fixed in 6.0.8, 6.1.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-108822 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-108822?** Check whether you run Kamailio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 6.0.8, 6.1.4

## Technical details

The isup_get_calling_party function in the sipt module (src/modules/sipt/ss7_parser.c) fails to properly validate the length argument, leading to a classic buffer overflow. The vulnerability is remotely exploitable via malformed ISUP messages in SIP traffic and requires no authentication. An attacker can overwrite stack memory to achieve denial of service or code execution.

## Affected products

- Kamailio Kamailio up to 6.0.7, 6.1.3

## Timeline

- 2026-10-12: disclosed
- 2026-09-02: patched: Commit 3667bebf8d0bea07ed16218fd921d07db87aeb21

## References

- [https://github.com/kamailio/kamailio/](https://github.com/kamailio/kamailio/)
- [https://github.com/kamailio/kamailio/commit/3667bebf8d0bea07ed16218fd921d07db87aeb21](https://github.com/kamailio/kamailio/commit/3667bebf8d0bea07ed16218fd921d07db87aeb21)

## Related threats

- [Kamailio stack buffer overflow in ims_qos_npn module](https://junglewise.ai/threats/cve-2026-106804-a-stack-based-buffer-overflow-exists-in-kamailio-v6-1-3-and-v6-1)
- [Kamailio stack buffer overflow in ims_registrar_pcscf module](https://junglewise.ai/threats/cve-2026-106803-a-stack-based-buffer-overflow-exists-in-kamailio-v6-1-3-and-v6-1)
- [Kamailio heap buffer overflow in CDP Diameter Receiver](https://junglewise.ai/threats/cve-2026-93962-a-weakness-has-been-identified-in-kamailio-up-to-5-8-8-6-0-7-6-1)
- [Kamailio ims_registrar_pcscf double free in security agreement parsing](https://junglewise.ai/threats/cve-2026-52023-kamailio-ims-registrar-pcscf-double-free-in-security-agreement)
- [Kamailio IMS P-CSCF denial of service in REGISTER handling](https://junglewise.ai/threats/cve-2026-52022-kamailio-ims-p-cscf-denial-of-service-in-register-handling)