CVE-2026-53561 Auth bypass in Apache Hive
Unauthenticated attackers can impersonate any Hive user via forged SAML tokens in HTTP mode, gaining unauthorized access to data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53561?
CVE-2026-53561 is a high-severity authentication bypass vulnerability in Apache Hive, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper authentication vulnerability in HiveServer2 SAML bearer-token validation in Apache Hive 4.0.0 through 4.2.0 (and later unreleased branches) on deployments using HTTP transport with hive.server2.authentication=SAML allows an unauthenticated network attacker to authenticate as an arbitrary Hive user and obtain an authenticated HiveServer2 session via a forged Authorization: Bearer token sent to the /cliservice HTTP endpoint. Users are recommended to upgrade to 4.2.1 version that includes the fix for this issue.
Access / authorization required: No Hive credentials, SAML IdP login, or knowledge of the server signing secret is required. The attacker only needs network reachability to the HiveServer2 HTTP port (typically /cliservice), directly or through a reverse proxy such as Apache Knox that forwards unauthenticated requests to HS2. The instance must have SAML authentication enabled in HTTP mode. Deployments where Knox handles SSO and HiveServer2 uses LDAP/Kerberos (not native SAML mode) are not affected by this specific issue.
Which versions are affected by CVE-2026-53561?
It affects 1 product.
Products include Apache Hive.
How do I fix CVE-2026-53561?
No fix has been published for CVE-2026-53561 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-53561 being exploited?
There is no known exploitation of CVE-2026-53561 in the wild and no public exploit code.
Other vulnerabilities in Apache Hive
- CVE-2026-49845 Apache Hive: SQL Injection vulnerability in HiveMetaStore partition-name direct-SQL paths
- CVE-2018-21234 Deserialization of Untrusted Data in Jodd
- CVE-2026-55976 Apache Hive: SSRF vulnerability in Hive Avro Serde due to Insufficient input validation on avro.schema.url
- CVE-2018-1282 SQL Injection in hive-jdbc
- CVE-2022-41137 Apache Hive: Deserialization of untrusted data when fetching partitions from the Metastore
Sources
Also known as GHSA-g32f-6xhp-3ffw.