Vulnerability details
CVE-2026-15432
Google Tink-AndroidGoogle Tink-Java
Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification
CVSS 4.0
8.2High
Official description
When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially allows an attacker to use timinig information as a side channel in order to get information how many bytes of a given tag match the correct tag. This in turn could allow to find a correct tag bytewise.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.2High | 4.0 | CVEProject cvelistV5 (CNA) (Google) | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Tink-Android | All releases before 1.21.0, including 1.21.0. | CVEProject cvelistV5 (CNA) | |
| Tink-Java | All releases before 1.21.0, including 1.21.0. | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-07-21
- Last updated
- 2026-07-22
- State
- Published
- Assigner (CNA)
Exploit prediction (EPSS)
0.18%
Probability of exploitation in 30 days
7.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-208Observable Timing Discrepancy