CVE-2026-45771 (GCVE-0-2026-45771)
Vulnerability from cvelistv5 – Published: 2026-06-09 15:51 – Updated: 2026-06-09 18:24
VLAI
EPSS
VEX
Title
Freeswitch Denial-of-Service in SIP PUBLISH Requests via XML Entity Expansion
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 18:24 UTC
CWE
- CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/signalwire/freeswitch/security… | x_refsource_CONFIRM |
| https://github.com/signalwire/freeswitch/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| signalwire | freeswitch |
Affected:
< 1.11.0
|
guessed |
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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