VulnSocial

CVE-2026-42346Disclosure

LOWCVSS 6.5 · MEDIUM

Signal is active with 2 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

Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU (Time-of-Check-Time-of-Use) vulnerability: isSafePublicHttpsUrl() resolves DNS to validate the target IP, but subsequent fetch() calls resolve DNS independently. An attacker controlling a DNS server can exploit this gap via DNS rebinding to redirect requests to internal network addresses. This issue has been patched in version 2.21.7.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-918

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-05-09: 2Technical Details · 2026-05-09: 205-09
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-42346 Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU (… https://www.cve.org/CVERecord?id=CVE-2026-42346

    Post summary

    The post announces CVE-2026-42346, a TOCTOU‑related SSRF vulnerability in Postiz versions 2.16.6 to 2.21.6, but does not provide proof‑of‑concept, exploit code, active exploitation evidence, or patch information.

    00000105
    57.5K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-42346 Server-Side Request Forgery via DNS Rebinding in Postiz Versions 2.16.6–2.21.6 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42346

    Post summary

    The post announces a Server‑Side Request Forgery vulnerability in Postiz 2.16.6–2.21.6 caused by DNS rebinding, but offers neither PoC nor exploit details, patch info, nor evidence of active exploitation.

    0000058
    4.0K followersView on X

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