---
id: CVE-2026-95105
title: >-
  Reliance on Obfuscation or Encryption of Security-Relevant Inputs without
  Integrity Checking vulnerability in danielberkompas cloak allows an attacker
  with write access to stored ciphertext to make it decrypt to a chosen value
  via bit fl…
summary: >-
  Reliance on Obfuscation or Encryption of Security-Relevant Inputs without
  Integrity Checking vulnerability in danielberkompas cloak allows an attacker
  with write access to stored ciphertext to make it decrypt to a chosen value
  via bit fl…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-649
vendor: danielberkompas
product: cloak
affected:
  - cloak >= 0.1.0-pre < *
  - danielberkompas/cloak >= 2bd17019e285b55c5c218cc842537bf9280f24c3 < *
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:17:57.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-95105'
references:
  - url: 'https://cna.erlef.org/cves/CVE-2026-95105.html'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://osv.dev/vulnerability/EEF-CVE-2026-95105'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-06T08:50:17.459Z'
---

## Overview

Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.

Cloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.

This issue affects cloak: from 0.1.0-pre onward.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.