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CVE-2026-40896

OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. Version 17.3.0 patches the issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3f38788c1c9905472c00363633a8a239d8a840e4e95055492e3e4fc2c8a6381a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"openproject","vendor":"opf","versions":[{"status":"affected","version":"< 17.3.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/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:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe","tags":["x_refsource_MISC"],"url":"https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/references/1
{"name":"https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245","tags":["x_refsource_CONFIRM"],"url":"https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f5fe7c676415ebfafebfade56db11779949cbe6b94b09803fdb89c3b7a182026 · sha256:ae7e9ccdb137ca94… · /containers/adp/0/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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