Squidbleed - Vulnerability

Threat entity extracted from intelligence sources

Frequency
7
occurrences
First Seen
June 22, 2026
Last Seen
June 23, 2026

Squidbleed is a vulnerability tracked by ThreatCluster, appearing in 1 threat cluster built from 7 intelligence report mentions.

Squidbleed is a vulnerability tracked across 1 threat cluster and 7 intelligence report mentions on ThreatCluster. First observed June 22, 2026; most recent activity June 23, 2026.

Related Threat Clusters

Recent Intelligence Reports

  • Mythos discovers 'Squidbleed,' a memory leak that's gone undetected since Clinton era — Theregister · June 23, 2026
  • Squidbleed: 29-Year — Securityaffairs.Co · June 23, 2026
  • 29-Year — Gbhackers · June 23, 2026
  • Squid proxy vulnerability dubbed Squidbleed discovered — Feeds.Feedburner · June 22, 2026
  • Decades — Feeds.4Sysops · June 22, 2026
  • 29-Year-Old Squid Proxy Bug 'Squidbleed' Can Leak Cleartext HTTP Requests — Thehackernews · June 22, 2026
  • 29-Year-Old ‘Squidbleed’ Vulnerability Discovered With the Aid of Claude Mythos Preview — Cybersecuritynews · June 22, 2026

Related Entities

Data Breach CVE-2026-47729 Cwe-125 - Out-of-bounds Read CWE-200 - Exposure of Sensitive Information T1041 - Exfiltration Over C2 Channel Chromium-based Browsers FTP HTTP Linux NetWare Squid Squid Proxy

Frequently asked questions

What is Squidbleed?

Squidbleed is a vulnerability tracked by ThreatCluster, appearing in 1 threat cluster built from 7 intelligence report mentions.

Is Squidbleed still active?

The most recent intelligence report mentioning Squidbleed on ThreatCluster is dated June 23, 2026. Activity was first observed June 22, 2026, giving a tracked span from then to June 23, 2026.

What is Squidbleed associated with?

Across ThreatCluster reporting, Squidbleed most frequently co-occurs with Data Breach, CVE-2026-47729, Cwe-125 - Out-of-bounds Read, CWE-200 - Exposure of Sensitive Information, T1041 - Exfiltration Over C2 Channel, among 12 tracked related entities.

What are the latest developments involving Squidbleed?

The most significant recent cluster is “Critical Squid Proxy Vulnerability 'Squidbleed' Exposes User Data” (10 articles · Updated June 22, 2026). Squidbleed appears across 1 threat cluster in total, listed above with sources.

How much reporting does ThreatCluster have on Squidbleed?

Squidbleed appears in 7 intelligence report mentions across 1 deduplicated threat cluster, aggregated from 17,000+ monitored sources.

CVSS v3.1 Breakdown