CVE-2026-15432CWE-208

CVE-2026-15432

Medium · published July 21, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
5.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00164 · 5.4th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2026-07-21T21:17Z
Affected products (1)
ProductVersionsFixed in
google/tink_java≤ 1.21.0—
References (1)
https://github.com/tink-crypto/tink-java/issues/75 · [email protected]
EPSS history
Timeline
  • 21 JUL 16:42Z
    Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification
    cvelistv5