CVE-2026-12075Disclosure

LOW

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

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0.0/ 10 priority

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

Signal classification1 categories

Disclosure

1100.0%

Full discourse1 post

Upwind Security MDR@UpwindMDR46d
Disclosure
🚨High - NLTK urlopen SSRF Protection Bypass via DNS Rebinding (CVE-2026-12075) NLTK's nltk.pathsec.urlopen ENFORCE mode validates the hostname’s resolved IP, but the subsequent HTTP request performs a second DNS resolution. An attacker controlling DNS can return a public IP during validation and then rebind to internal/loopback during connect, enabling full-response SSRF and metadata/internal service exposure. 👉Affected: nltk (versions using nltk.pathsec.urlopen ENFORCE mode)
Post summary
The tweet announces CVE-2026-12075, a high severity SSRF bypass in NLTK’s urlopen via DNS rebinding, enabling internal service exploitation.
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