CVE-2026-58307Public exploit

Crash via mishandled interpreter register lifetimes

Published Jul 9, 2026 · Updated Jul 9, 2026

Out-of-bounds read and reachable assertion in Escargot before 2dee22f5c7b8bf31cb7252d7731fae8c07f2842c allow local users to crash it. Label resolution for a for-of continue wrongly unwinds iterator cleanup and leaves an empty result value, while switch code releases a discriminant register before finalizing a using declaration, allowing the disposable-record slot to be reused and dereferenced as a pointer. Execution of attacker-supplied JavaScript with user interaction is required; observed outcomes include assertion aborts, segmentation faults, silent script termination, and input-data manipulation.

CVSS severity6.1
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read and reachable assertion in Escargot before 2dee22f5c7b8bf31cb7252d7731fae8c07f2842c allow local users to crash it. Label resolution for a for-of continue wrongly unwinds iterator cleanup and leaves an empty result value, while switch code releases a discriminant register before finalizing a using declaration, allowing the disposable-record slot to be reused and dereferenced as a pointer. Execution of attacker-supplied JavaScript with user interaction is required; observed outcomes include assertion aborts, segmentation faults, silent script termination, and input-data manipulation.

The record

CVE
CVE-2026-58307
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Escargot
Classifications
CWE-617, CWE-125
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2dee22f5c7b8bf31cb7252d7731fae8c07f2842c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Escargotversion=0 <2dee22f5c7b8bf31cb7252d7731fae8c07f2842c

Published CVSS scores

6.1Samsung TV & ApplianceCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
CWE-125Out-of-bounds Read

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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