{"id":"CVE-2026-95105","published":"2026-10-06T09:17:57.200","lastModified":"2026-10-06T15:03:59.427","description":"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.\n\nCloak.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.\n\nThis issue affects cloak: from 0.1.0-pre onward.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-649"],"vendors":[],"products":[],"references":[{"url":"https://cna.erlef.org/cves/CVE-2026-95105.html","tags":[]},{"url":"https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3","tags":[]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-95105","tags":[]},{"url":"https://cna.erlef.org/cves/CVE-2026-95105.html","tags":[]}],"exploitRefs":[{"url":"https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3","tags":[]}],"hasPoc":true,"ai":null}