Cyber Resilience

CVE-2026-41055

SSRF in Wwbn Avideo ≤ 29.0

Public PoCSSRF
Published
21 April 2026
Modified
23 April 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.6
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS Score 0.0038 31th percentile
Risk Priority 61 floored blend · peak EPSS

Summary

CVE-2026-41055 is a high-severity SSRF (CWE-918) vulnerability in Wwbn Avideo. Its CVSS base score is 8.6 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 31th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to AC-4 (Information Flow Enforcement) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-41055 is a server-side request forgery (SSRF) vulnerability affecting WWBN AVideo, an open source video platform, in versions 29.0 and below. The issue resides in the LiveLinks proxy, where an incomplete SSRF fix introduced `isSSRFSafeURL()` validation but failed to address DNS time-of-check-to-time-of-use (TOCTOU) vulnerabilities. This allows DNS rebinding attacks, in which the DNS resolution checked during validation differs from the one used in the subsequent HTTP request, enabling redirection to internal endpoints. The vulnerability is classified under CWE-918 and carries a CVSS v3.1 base score of 8.6 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).

Remote attackers can exploit this vulnerability without authentication or user interaction due to its network accessibility and low attack complexity. By manipulating DNS rebinding, attackers can bypass the SSRF protections and trick the LiveLinks proxy into making requests to internal network resources, potentially leading to high confidentiality impacts such as unauthorized access to sensitive internal services or data.

GitHub security advisories (GHSA-793q-xgj6-7frp, GHSA-9x67-f2v7-63rw) and related commits detail mitigation. An initial partial fix appears in commit 0e56382921fc71e64829cd1ec35f04e338c70917, but the complete resolution is provided in commit 8d8fc0cadb425835b4861036d589abcea4d78ee8, which addresses the DNS TOCTOU issue. Security practitioners should update to a version incorporating this commit and review configurations of the LiveLinks proxy.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

WWBN AVideo is an open source video platform. In versions 29.0 and below, an incomplete SSRF fix in AVideo's LiveLinks proxy adds `isSSRFSafeURL()` validation but leaves DNS TOCTOU vulnerabilities where DNS rebinding between validation and the actual HTTP request redirects…

more

traffic to internal endpoints. Commit 8d8fc0cadb425835b4861036d589abcea4d78ee8 contains an updated fix.

CWE(s)
CWE-918

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-33502Same product: Wwbn Avideo
CVE-2026-33294Same product: Wwbn Avideo
CVE-2026-33237Same product: Wwbn Avideo
CVE-2026-27732Same product: Wwbn Avideo
CVE-2026-39368Same product: Wwbn Avideo
CVE-2026-41060Same product: Wwbn Avideo
CVE-2026-33766Same product: Wwbn Avideo
CVE-2026-39370Same product: Wwbn Avideo
CVE-2026-33351Same product: Wwbn Avideo
CVE-2026-33039Same product: Wwbn Avideo

Affected Assets

wwbn
avideo
≤ 29.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.6
  • V1.5.3
  • V5.3.2
  • V10.4.7

Mitigating Controls (NIST 800-53 r5) AI

AC-4 Information Flow Enforcement good match

Information flow enforcement can restrict which destinations the server is allowed to contact on behalf of users.

SI-10 Information Input Validation good match

Input validation directly stops untrusted URLs from being accepted and fetched without destination checks.

SC-7 Boundary Protection partial match

Boundary protection limits the network reach of server-initiated requests even if SSRF occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure development practices directly include input validation and destination allow-listing that prevent SSRF.

DE.CM-09 partial match
prevents

Runtime monitoring of web applications and services can detect anomalous outbound requests indicative of SSRF.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover and record SSRF flaws in web applications.

PR.IR-01 partial match
prevents

Network segmentation and egress controls can limit the damage from successful SSRF requests.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.7 Threat intelligence partial match
prevents

Operational threat data describing SSRF campaigns can be used to tighten outbound-request allow-lists and detection rules before attackers exploit them.

References