Katalog CVE

CVE-2026-105926

ŚrednieCVSS 5.3
Opublikowano: Zaktualizowano: Przetłumaczono: NVD NIST

Prawdopodobieństwo exploitacji (EPSS)

Niskie ryzyko
0.41%

Percentyl 34 - wyżej niż 34% wszystkich znanych CVE

Streszczenie

Apache Pulsar broker nie sprawdzał autoryzacji dla komend GetSchema i GetOrCreateSchema w protokole binarnym — weryfikowano jedynie uwierzytelnienie klienta. Uwierzytelniony klient bez uprawnień do tematu mógł odczytać schemat z innego namespace/tenanta lub zarejestrować nową wersję schematu, co mogło powodować błędy niezgodności schematu u legalnych producentów i konsumentów. Problem dotyczy wdrożeń z włączoną autoryzacją w wersjach 2.2.0–4.0.13, 4.1.0–4.1.3 oraz 4.2.0–4.2.4.

Ocena ryzyka

Możliwe jest ujawnienie definicji schematów (nazwy i typy pól) z innych tenantów oraz zakłócenie działania tematu poprzez wymuszenie niezgodności schematu u legalnych klientów. Nie ma możliwości odczytu ani modyfikacji treści wiadomości.

Rekomendacja

Zaktualizuj Apache Pulsar do co najmniej 4.0.14 (dla 4.0.x) lub 4.2.5 (dla 4.1.x i 4.2.x). Po aktualizacji broker wymaga uprawnienia lookup dla GetSchema i produce dla GetOrCreateSchema.

Inne podatności w Apache Pulsar

Zobacz wszystkie
Oryginalny opis (angielski, źródło NVD)

The Pulsar broker serves two schema commands on its binary protocol: GetSchema, which returns the schema registered for a topic, and GetOrCreateSchema, which registers a new schema version for an existing topic. The broker handled both commands after checking only that the client connection was authenticated. Unlike the broker's other topic commands, such as those for creating producers and consumers or for looking up topics, these two commands did not check whether the authenticated client was authorized for the target topic. The Pulsar REST API endpoints for schemas were not affected. An authenticated client without any permission on the target topic, namespace or tenant could use these commands to: - read the schema registered for a topic in another namespace or tenant, disclosing the schema definition such as record field names and types. Message payloads are not disclosed. - register a new schema version on an existing topic in another namespace or tenant. The topic's schema compatibility and schema auto-update policies still apply. The issue does not allow message data to be read or modified, but a registered schema version can cause legitimate producers and consumers of that topic to fail with schema incompatibility errors until the schema is corrected by an administrator. The standard Pulsar client performs an authorized topic lookup before it sends these commands, so the missing check could not be observed when testing with the standard client. A client that implements the binary protocol directly is not required to perform that lookup first. This issue is relevant only to deployments that have authentication and authorization enabled. The GetSchema command is affected from Apache Pulsar 2.2.0, and the GetOrCreateSchema command from Apache Pulsar 2.5.0. After the fix, the broker requires the lookup permission on the topic for GetSchema and the produce permission on the topic for GetOrCreateSchema. This impact analysis assumes that Pulsar has been configured with the default authorization provider. For custom authorization providers, the impact could be slightly different. This issue affects Apache Pulsar versions from 2.2.0 before 4.0.14, from 4.1.0 through 4.1.3, and from 4.2.0 before 4.2.5. - 4.0.x version users should upgrade to at least 4.0.14. - 4.1.x and 4.2.x version users should upgrade to at least 4.2.5. Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions. The currently supported Apache Pulsar release lines are 4.0.x and 5.0.x. The supported versions schedule is available at https://pulsar.apache.org/contribute/release-policy/.

Dane podatności pochodzą z NVD (NIST) · CISA KEV · EPSS