CVE-2026-15432
CVE-2026-15432 is a medium-severity vulnerability in Google Tink Java with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-208.
Key facts
- Severity: Medium (CVSS 3.x base score 5.9)
- CVSS v4: 8.2
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-208
- Affected product: Google Tink Java
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-15432?
- 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.
- How severe is CVE-2026-15432?
- CVE-2026-15432 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2026-15432 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-15432?
- CVE-2026-15432 affects Google Tink Java. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-15432?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-15432 published?
- CVE-2026-15432 was published on 2026-07-21 and last updated on 2026-09-22.
References
Affected products (1)
- cpe:2.3:a:google:tink_java:*:*:*:*:*:*:*:*
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