CVE-2025-48935Public exploitNetwork attack vector

Filesystem permission bypass via unsupervised ATTACH statements

Published Jun 4, 2025 · Updated Jun 4, 2025

Incorrect authorization in Deno 2.2.0 through 2.2.4 allows attackers to read or write SQLite database files through node:sqlite ATTACH DATABASE. DatabaseSync checked the initial database path but passed attached database paths to SQLite without applying Deno's filesystem permission checks. Execution of attacker-controlled JavaScript in the runtime is required; attached paths can then expose or modify databases beyond granted permissions.

CVSS severity9.1
Critical
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Deno 2.2.0 through 2.2.4 allows attackers to read or write SQLite database files through node:sqlite ATTACH DATABASE. DatabaseSync checked the initial database path but passed attached database paths to SQLite without applying Deno's filesystem permission checks. Execution of attacker-controlled JavaScript in the runtime is required; attached paths can then expose or modify databases beyond granted permissions.

The record

CVE
CVE-2025-48935
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
Deno Land Inc.
Product
Deno
Classifications
CWE-863, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record 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=>= 2.2.0, < 2.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Deno Land Inc. · Denoversion=>= 2.2.0, < 2.2.5

Published CVSS scores

5.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

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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