CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NCVE-2020-8929
Medium (5.3) in google tink java. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in com.google.crypto.tink:tink 1.5.0.
A mis-handling of invalid unicode characters in the Java implementation of Tink versions prior to 1.5 allows an attacker to change the ID part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic AEAD with a single key, and rely on a unique ciphertext-per-plaintext.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
- CWE
- CWE-176
- Published
- Modified
- Record from
- the NVD, synced
Affected
- google:tink_java
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g5vf-v6wf-7w2r | Maven | com.google.crypto.tink:tink | <1.5.0 | 1.5.0 |
| PYSEC-2020-142 | PyPI | tink | <1.5.0 | 1.5.0 |