aes-gcm is a pure Rust implementation of the AES-GCM. In decrypt_in_place_detached, the decrypted ciphertext (which is the correct ciphertext) is exposed even if the tag is incorrect. This is because in decrypt_inplace in asconcore.rs, tag verification causes an error to be returned with the plaintext contents still in buffer. The vulnerability is fixed in 0.4.3.
CVE ID: CVE-2025-27498
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.6
CVSS Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Vendor: RustCrypto
Product: AEADs
EPSS Score: 0.01% (probability of being exploited)
EPSS Percentile: 0.39% (scored less or equal to compared to others)
EPSS Date: 2025-04-01 (when was this score calculated)