CVE-2026-42809
Apache Polaris: staged table creation could vend storage credentials for unvalidated locations
Description
Apache Polaris can issue broad temporary ("vended") storage credentials during staged table creation before the effective table location has been validated or durably reserved. Those temporary credentials are meant to limit the scope of accessible table data and metadata, but this scope limitation becomes attacker- directed because the attacker can choose a reachable target location. In the confirmed variant, if the caller supplies a custom `location` during stage create and requests credential vending, Apache Polaris uses that location to construct delegated storage credentials immediately. The stage-create path itself neither runs the normal location validation nor the overlap checks before those credentials are issued. Closely related to that, the staged-create flow also accepts `write.data.path` / `write.metadata.path` in the request properties and feeds those location overrides into the same effective table location set used for credential vending. Those fields are secondary to the main custom-`location` exploit, but they are still attacker-influenced location inputs that should be validated before any credentials are issued.
INFO
Published Date :
May 4, 2026, 5:16 p.m.
Last Modified :
Oct. 26, 2026, 7:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | f0158376-9dc2-43b6-827c-5f631a4d8d09 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | f0158376-9dc2-43b6-827c-5f631a4d8d09 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Validate table locations before credential vending.
- Check for overlaps before issuing credentials.
- Ensure custom locations are validated.
- Apply input validation to location overrides.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42809.
| URL | Resource |
|---|---|
| https://lists.apache.org/thread/8tfsr8y7pgq6rdcvjx95hkcr47td671r | Mailing List Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/05/02/10 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42809 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42809
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42809 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42809 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: Apache Polaris de Apache Software Foundation, Description: Apache Polaris puede emitir credenciales de almacenamiento temporales amplias (’vendidas’) durante la creación de tablas por etapas antes de que la ubicación efectiva de la tabla haya sido validada o reservada de forma duradera. Esas credenciales temporales están destinadas a limitar el alcance de los datos y metadatos de la tabla accesibles, pero esta limitación de alcance se vuelve dirigida por el atacante porque el atacante puede elegir una ubicación de destino alcanzable. En la variante confirmada, si el llamador proporciona una ’location’ personalizada durante la creación de la etapa y solicita la emisión de credenciales, Apache Polaris utiliza esa ubicación para construir credenciales de almacenamiento delegadas inmediatamente. La propia ruta de creación de la etapa no ejecuta la validación de ubicación normal ni las comprobaciones de superposición antes de que se emitan esas credenciales. Estrechamente relacionado con eso, el flujo de creación por etapas también acepta ’write.data.path’ / ’write.metadata.path’ en las propiedades de la solicitud y alimenta esas anulaciones de ubicación en el mismo conjunto de ubicación de tabla efectiva utilizado para la emisión de credenciales. Esos campos son secundarios al exploit principal de ’location’ personalizada, pero siguen siendo entradas de ubicación influenciadas por el atacante que deben validarse antes de que se emitan las credenciales. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache Polaris', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.4.1', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-42809', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-04T16:30:34.510659Z'} -
Initial Analysis by [email protected]
May. 12, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:apache:polaris:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.1 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/05/02/10 Types: Mailing List, Third Party Advisory Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/8tfsr8y7pgq6rdcvjx95hkcr47td671r Types: Mailing List, Vendor Advisory -
New CVE Received by [email protected]
May. 04, 2026
Action Type Old Value New Value Added Description Apache Polaris can issue broad temporary ("vended") storage credentials during staged table creation before the effective table location has been validated or durably reserved. Those temporary credentials are meant to limit the scope of accessible table data and metadata, but this scope limitation becomes attacker- directed because the attacker can choose a reachable target location. In the confirmed variant, if the caller supplies a custom `location` during stage create and requests credential vending, Apache Polaris uses that location to construct delegated storage credentials immediately. The stage-create path itself neither runs the normal location validation nor the overlap checks before those credentials are issued. Closely related to that, the staged-create flow also accepts `write.data.path` / `write.metadata.path` in the request properties and feeds those location overrides into the same effective table location set used for credential vending. Those fields are secondary to the main custom-`location` exploit, but they are still attacker-influenced location inputs that should be validated before any credentials are issued. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-20 Added CWE CWE-862 Added Reference https://lists.apache.org/thread/8tfsr8y7pgq6rdcvjx95hkcr47td671r -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 04, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/05/02/10