Vulnerability details
CVE-2026-45771
signalwire freeswitch
Freeswitch Denial-of-Service in SIP PUBLISH Requests via XML Entity Expansion
CVSS 3.1
7.5High
Official description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.0, FreeSWITCH's bundled XML parser expands nested <!ENTITY> declarations without a depth or count bound, so a small DTD can describe a body that expands exponentially ("billion laughs"). The PIDF body of a SIP PUBLISH is fed to this parser before any digest check, letting an unauthenticated network attacker force unbounded CPU and memory consumption with a single request. This issue has been patched in version 1.11.0.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| signalwire | freeswitch | < 1.11.0 | CVEProject cvelistV5 (CNA) |
References and advisories
2- https://github.com/signalwire/freeswitch/security/advisories/GHSA-5vjg-pv56-vg4c x_refsource_CONFIRM
- https://github.com/signalwire/freeswitch/releases/tag/v1.11.0 x_refsource_MISC
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Details
- Published
- 2026-06-09
- Last updated
- 2026-06-09
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.34%
Probability of exploitation in 30 days
28%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')