VulnSocial

CVE-2026-63095Disclosure

LOWCVSS 7.1 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Dendrite through 0.13.8 contains an improper authorization vulnerability in the Matrix Client-Server API that allows any authenticated local user to delete third-party identifier bindings belonging to other users by submitting an arbitrary address and medium to the account deletion endpoint without ownership verification. Attackers can exploit the unverified Forget3PID handler to remove a victim's email or MSISDN binding and subsequently rebind the address through an identity server to hijack the victim's password reset flow.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-639

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-21: 1Technical Details · 2026-07-21: 107-21
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Cyber Threat Observatory | Alan Turing Institute@TuringCyberObs
    Disclosure

    CVE-2026-63095 Dendrite Matrix Authorisation bypass could let local users delete another user’s email or phone binding, weakening account recovery and identity-linked session controls Analysis: https://github.com/alan-turing-institute/cyber-threat-observatory/blob/main/reports/2026-07-17/TIER_2_CVE-2026-63095.md #CyberSecurity #IdentitySecurity #VulnerabilityManagement

    Post summary

    The post announces CVE‑2026‑63095, detailing an authorization‑bypass flaw in Dendrite Matrix that permits local users to delete another user's email or phone binding, thereby weakening account recovery and identity‑linked session controls.

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    59 followersView on X

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