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CVE-2026-34840

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, OneUptime's SAML SSO implementation (App/FeatureSet/Identity/Utils/SSO.ts) has decoupled signature verification and identity extraction. isSignatureValid() verifies the first <Signature> element in the XML DOM using xml-crypto, while getEmail() always reads from assertion[0] via xml2js. An attacker can prepend an unsigned assertion containing an arbitrary identity before a legitimately signed assertion,
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5ad5a29707f0252c5399548fe6f21196cd5480da571a263f98ef346588908ea0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"oneuptime","vendor":"OneUptime","versions":[{"status":"affected","version":"< 10.0.42"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a35b1a4e55aecd5557f0904844e2ca7b22386ec1e47d695e1d3c1307d2151b49 · sha256:0b074304a9afd44f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a35b1a4e55aecd5557f0904844e2ca7b22386ec1e47d695e1d3c1307d2151b49 · sha256:0b074304a9afd44f… · /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:a35b1a4e55aecd5557f0904844e2ca7b22386ec1e47d695e1d3c1307d2151b49 · sha256:0b074304a9afd44f… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/OneUptime/oneuptime/commit/2fd7ede52f60444710628d6c1b34dee2ef9e57d1","tags":["x_refsource_MISC"],"url":"https://github.com/OneUptime/oneuptime/commit/2fd7ede52f60444710628d6c1b34dee2ef9e57d1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a35b1a4e55aecd5557f0904844e2ca7b22386ec1e47d695e1d3c1307d2151b49 · sha256:0b074304a9afd44f… · /containers/cna/references/1
{"name":"https://github.com/OneUptime/oneuptime/releases/tag/10.0.42","tags":["x_refsource_MISC"],"url":"https://github.com/OneUptime/oneuptime/releases/tag/10.0.42"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a35b1a4e55aecd5557f0904844e2ca7b22386ec1e47d695e1d3c1307d2151b49 · sha256:0b074304a9afd44f… · /containers/cna/references/2
{"name":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-5w5c-766x-265g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-5w5c-766x-265g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a35b1a4e55aecd5557f0904844e2ca7b22386ec1e47d695e1d3c1307d2151b49 · sha256:0b074304a9afd44f… · /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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