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CVE-2026-6966

Improper verification of cryptographic signature uniqueness in delegated role validation in awslabs/tough before tough-v0.22.0 allows remote authenticated users to bypass the TUF signature threshold requirement by duplicating a valid signature, causing the client to accept forged delegated role metadata. We recommend you upgrade to tough-v0.22.0 / tuftool-v0.15.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3edce4bba2292effc38ded83c8feb4e05c79e475f3a1bc385856b5e42118b8f0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"tuftool","vendor":"AWS","versions":[{"status":"unaffected","version":"0.15.0"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"tough","vendor":"AWS","versions":[{"status":"unaffected","version":"0.22.0"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"tuftool","vendor":"AWS","versions":[{"status":"unaffected","version":"0.15.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"tough","vendor":"AWS","versions":[{"status":"unaffected","version":"0.22.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"tags":["vendor-advisory"],"url":"https://aws.amazon.com/security/security-bulletins/2026-019-aws/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/references/0
{"tags":["patch"],"url":"https://crates.io/crates/tough/0.22.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/references/3
{"tags":["patch"],"url":"https://crates.io/crates/tuftool/0.15.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/awslabs/tough/releases/tag/tough-v0.22.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/awslabs/tough/releases/tag/tuftool-v0.15.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/references/2
{"tags":["third-party-advisory"],"url":"https://github.com/awslabs/tough/security/advisories/GHSA-8m7c-8m39-rv4x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:feb3ebc4e6c5412aae9e783eb24f927bee961cdb2832588df998fdb0995dc3ab · sha256:d5a81758ac17ce0b… · /containers/cna/references/5

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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