CVE-2025-24015Public exploitNetwork attack vector

Ciphertext integrity bypass via skipped GCM tag check

Published Jun 3, 2025 · Updated Jun 4, 2025

Improper AES-GCM authentication in Deno 1.46.0 through 2.1.6 allows attackers to accept tampered ciphertext as valid data. The Node.js compatibility Decipheriv.final() path discarded its crypto context before invoking the finalization operation that verifies the authentication tag, and the same omission made set_aad checks ineffective. Any application that relies on Deno's AES-128-GCM or AES-256-GCM decryption can silently process modified ciphertext or data protected with an incorrect key.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper AES-GCM authentication in Deno 1.46.0 through 2.1.6 allows attackers to accept tampered ciphertext as valid data. The Node.js compatibility Decipheriv.final() path discarded its crypto context before invoking the finalization operation that verifies the authentication tag, and the same omission made set_aad checks ineffective. Any application that relies on Deno's AES-128-GCM or AES-256-GCM decryption can silently process modified ciphertext or data protected with an incorrect key.

The record

CVE
CVE-2025-24015
Published
Jun 3, 2025
Updated
Jun 4, 2025
Vendor
Deno Land Inc.
Product
Deno
Classifications
CWE-347, CAPEC-475, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 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=>= 1.46.0, < 2.1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Deno Land Inc. · Denoversion=>= 1.46.0, < 2.1.7

Published CVSS scores

7.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

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

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-347Improper Verification of Cryptographic Signature
CAPEC-475Signature Spoofing by Improper Validation
T1565.002Transmitted Data Manipulation

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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