CVE-2026-58612Disclosure(microsoft / powershell)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft powershell systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Server-side request forgery (ssrf) in Microsoft PowerShell Core allows an unauthorized attacker to disclose information over a network.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58612

Weakness type (CWE)

CWE-918

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

powershell

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-08-11); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

microsoft

Products

powershell

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets1 URL

By indicator

https://windowsforum.com/security-alerts.84/cve-2026-58612-powershell-flaw-affected-versions-not-published.442492/?utm_source=x&utm_medium=social&utm_campaign=news_node84

Full discourse2 posts

HASAN FLAYYIH ABDULLAH@hasanfleyah15d
Disclosure
I discovered CVE-2026-58612, an Authorization header leak in PowerShell Invoke-WebRequest / Invoke-RestMethod. Using -PreserveHttpMethodOnRedirect or -AllowInsecureRedirect can cause PowerShell to forward credentials to a different host after a redirect https://t.co/NiDHiSAT6R
Post summary
The user announces a newly discovered CVE-2026-58612, detailing an Authorization header leak in PowerShell that forwards credentials across redirects when using certain flags, without providing a PoC, patch, or evidence of active exploitation.
0001089
123 followersView on X
Windows Forum@windowsforum46d
Disclosure
⚠️ Microsoft disclosed a PowerShell info leak but hasn’t published the affected versions. Translation: “Check every install” is the mitigation while admins play PowerShell detective. https://windowsforum.com/security-alerts.84/cve-2026-58612-powershell-flaw-affected-versions-not-published.442492/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #VulnerabilityManagement #PatchManagement #PowershellSecurity https://t.co/INRGEp7xRx
Post summary
Microsoft announced a PowerShell info‑leak (CVE‑2026‑58612) but has not released affected versions; the advised mitigation is to inspect all installations.
0000052
1.3K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	powershell	-	-	-

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