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CVE-2026-32953

Tillitis TKey Client package is a Go package for a TKey client. Versions 1.2.0 and below contain a critical bug in the tkeyclient Go module which causes 1 out of every 256 User Supplied Secrets (USS) to be silently ignored, producing the same Compound Device Identifier (CDI)—and thus the same key material—as if no USS is provided. This happens because a buffer index error overwrites the USS-enabled boolean with the first byte of the USS digest, so any USS whose hash starts with 0x00 is effective
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d1b8cf22a9ab3a79de38bcf83246bceab4399ad0f67fa1bf6c6bc9a6caac51f5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"tkeyclient","vendor":"tillitis","versions":[{"status":"affected","version":"< 1.3.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:588fac8769af791523359d524ccc0ade6d3961c6dab20892bcabe7f58f325f7d · sha256:d12eb30b28d55d0e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"PHYSICAL","baseScore":4.7,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:588fac8769af791523359d524ccc0ade6d3961c6dab20892bcabe7f58f325f7d · sha256:d12eb30b28d55d0e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-303","description":"CWE-303: Incorrect Implementation of Authentication Algorithm","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:588fac8769af791523359d524ccc0ade6d3961c6dab20892bcabe7f58f325f7d · sha256:d12eb30b28d55d0e… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/tillitis/tkeyclient/commit/4954dccf0287657edf8d405057e134cdff9c59e8","tags":["x_refsource_MISC"],"url":"https://github.com/tillitis/tkeyclient/commit/4954dccf0287657edf8d405057e134cdff9c59e8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:588fac8769af791523359d524ccc0ade6d3961c6dab20892bcabe7f58f325f7d · sha256:d12eb30b28d55d0e… · /containers/cna/references/1
{"name":"https://github.com/tillitis/tkeyclient/releases/tag/v1.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/tillitis/tkeyclient/releases/tag/v1.3.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:588fac8769af791523359d524ccc0ade6d3961c6dab20892bcabe7f58f325f7d · sha256:d12eb30b28d55d0e… · /containers/cna/references/2
{"name":"https://github.com/tillitis/tkeyclient/security/advisories/GHSA-4w7r-3222-8h6v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tillitis/tkeyclient/security/advisories/GHSA-4w7r-3222-8h6v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:588fac8769af791523359d524ccc0ade6d3961c6dab20892bcabe7f58f325f7d · sha256:d12eb30b28d55d0e… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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