CVE-2026-44700Public exploitNetwork attack vector

Media interception via skipped DTLS fingerprint check

Published May 14, 2026 · Updated May 14, 2026

Improper certificate validation in Elixir WebRTC ex_webrtc before 0.15.1 and in 0.16.0 allows attackers to facilitate media interception. In ExWebRTC.DTLSTransport, the active-role handshake completion branch that returns no outgoing packets starts SRTP without comparing the peer certificate fingerprint with the SDP fingerprint. A full man-in-the-middle attack on SRTP media and SCTP-over-DTLS data requires insecure or compromised signalling, or a peer with the same validation gap; standard browser peers with TLS-protected signalling prevent interception.

CVSS severity8.7
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Elixir WebRTC ex_webrtc before 0.15.1 and in 0.16.0 allows attackers to facilitate media interception. In ExWebRTC.DTLSTransport, the active-role handshake completion branch that returns no outgoing packets starts SRTP without comparing the peer certificate fingerprint with the SDP fingerprint. A full man-in-the-middle attack on SRTP media and SCTP-over-DTLS data requires insecure or compromised signalling, or a peer with the same validation gap; standard browser peers with TLS-protected signalling prevent interception.

The record

CVE
CVE-2026-44700
Published
May 14, 2026
Updated
May 14, 2026
Vendor
Elixir WebRTC
Product
ex_webrtc
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.15.1
  2. Affected versionversion=>= 0.16.0, < 0.16.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Elixir WebRTC · ex_webrtcversion=< 0.15.1; version=>= 0.16.0, < 0.16.1

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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