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CVE-2026-58446

Presenton before 0.8.8-beta bundles an MCP server that, on server/Docker deployments configured with session authentication (AUTH_USERNAME/AUTH_PASSWORD), is reachable unauthenticated at /mcp because the nginx front-end does not apply the auth_request gate to that path and the MCP server auto-mints a valid internal session token for the configured user. A remote unauthenticated attacker can invoke MCP tools such as generate_presentation, performing authenticated application actions, consuming th
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:75ab08eccaec7c6570dcd2338d26fb89d324f88123bb3b596a71a6fa6e81ece7
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:github/presenton/presenton","product":"presenton","repo":"https://github.com/presenton/presenton","vendor":"presenton","versions":[{"lessThan":"0.8.8-beta","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-306","description":"Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"Fix Commit","tags":["patch"],"url":"https://github.com/presenton/presenton/commit/a1103dcef3c761cc8bab44e2862c81a49969abd7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/presenton/presenton/issues/678"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/adp/0/references/0
{"name":"Researcher Disclosure","tags":["technical-description","exploit"],"url":"https://github.com/presenton/presenton/issues/678"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/references/1
{"name":"Maintainer PR","tags":["issue-tracking"],"url":"https://github.com/presenton/presenton/pull/679"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/references/2
{"name":"Release Notes","tags":["release-notes"],"url":"https://github.com/presenton/presenton/releases/tag/electron-v0.8.8-beta"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/presenton-beta-authentication-bypass-of-session-auth-via-unprotected-mcp-endpoint"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:903c194fcd69988431ae7d1f040c67def11423f85e77911ee09045e8916b7c27 · sha256:04abd3587d7deed9… · /containers/cna/references/4

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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