Solr™ News

Apache Solr™ 10.0.0 available

News: 3 March 2026

The Solr PMC is pleased to announce the release of Apache Solr 10.0.0. Apache Solr is the blazing-fast, open source, multi-modal search platform built on the full-text, vector, and geospatial search capabilities of Apache Lucene. Its major features include powerful full-text search, vector search, hit highlighting, faceted search …


Apache Solr™ 9.10.1 available

News: 20 January 2026

The Solr PMC is pleased to announce the release of Apache Solr 9.10.1. Solr is the blazing-fast, open source, multi-modal search platform built on Apache Lucene. It powers full-text, vector, analytics, and geospatial search at many of the world's largest organizations. Other major features include Kubernetes and docker …


CVE-2026-22022: Unauthorized bypass of certain "predefined permission" rules in the RuleBasedAuthorizationPlugin

Security: 20 January 2026

Severity moderate Description Deployments of Apache Solr 5.3.0 through 9.10.0 that rely on Solr's "Rule Based Authorization Plugin" are vulnerable to allowing unauthorized access to certain Solr APIs, due to insufficiently strict input validation in those components. Only deployments that meet all of the following criteria …


CVE-2026-22444: Insufficient file-access checking in standalone core-creation requests

Security: 20 January 2026

Severity moderate Description The "create core" API of Apache Solr 8.6 through 9.10.0 lacks sufficient input validation on some API parameters, which can cause Solr to check the existence of and attempt to read file-system paths that should be disallowed by Solr's "allowPaths" security setting. These read-only …


CVE-2025-66516: Apache Solr extraction module vulnerable to XXE attacks via XFA content in PDFs

Security: 9 December 2025

Severity High Versions Affected Apache Solr 6.2.0 through 9.10.0 (when using the extraction module) Description Solr's extraction module (SolrCell) uses Apache Tika to extract content from PDF files. A vulnerability in Tika allows attackers to submit specially crafted PDFs that can read files from the server …


Apache Solr™ 9.10.0 available

News: 6 November 2025

The Solr PMC is pleased to announce the release of Apache Solr 9.10.0. Solr is the blazing-fast, open source, multi-modal search platform built on Apache Lucene. It powers full-text, vector, analytics, and geospatial search at many of the world's largest organizations. Other major features include Kubernetes and docker …


Apache Solr™ 9.9.0 available

News: 24 July 2025

The Solr PMC is pleased to announce the release of Apache Solr 9.9.0. Solr is the blazing-fast, open source, multi-modal search platform built on Apache Lucene. It powers full-text, vector, analytics, and geospatial search at many of the world's largest organizations. Other major features include Kubernetes and docker …


Solr AutoGeneratePhraseQueries and Minimum Should Match with Synonyms

3 June 2025

Let's see the interaction between autoGeneratePhraseQueries, synonyms, and minimum should match. Written by Anna Ruggero, R&D Software Engineer at Sease.


Apache Solr™ 9.8.1 available

News: 11 March 2025

The Solr PMC is pleased to announce the release of Apache Solr 9.8.1. Solr is the blazing-fast, open source, multi-modal search platform built on Apache Lucene. It powers full-text, vector, analytics, and geospatial search at many of the world's largest organizations. Other major features include Kubernetes and docker …


How to Use Apache Solr Request Parameters API

30 January 2025

Let's see how to set and view Apache Solr Request Parameters API. Written by Anna Ruggero, R&D Software Engineer at Sease.


CVE-2024-52012: Apache Solr: Configset upload on Windows allows arbitrary path write-access

Security: 26 January 2025

Severity moderate Versions Affected Apache Solr 6.6 through 9.7.0 Description Relative Path Traversal vulnerability in Apache Solr. Solr instances running on Windows are vulnerable to arbitrary filepath write-access, due to a lack of input-sanitation in the "configset upload" API. Commonly known as a "zipslip", maliciously constructed ZIP …


CVE-2025-24814: Apache Solr: Core-creation with "trusted" configset can use arbitrary untrusted files

Security: 26 January 2025

Severity moderate Versions Affected Apache Solr through 9.7 Description Core creation allows users to replace "trusted" configset files with arbitrary configuration Solr instances that (1) use the "FileSystemConfigSetService" component (the default in "standalone" or "user-managed" mode), and (2) are running without authentication and authorization are vulnerable to a sort …


Apache Solr™ 9.8.0 available

News: 23 January 2025

The Solr PMC is pleased to announce the release of Apache Solr 9.8.0. Solr is the blazing-fast, open source, multi-modal search platform built on Apache Lucene. It powers full-text, vector, analytics, and geospatial search at many of the world's largest organizations. Other major features include Kubernetes and docker …


Apache Solr Filter Queries: Integer or String Fields?

26 November 2024

Let's explore whether to index a field in Apache Solr as a string or integer for optimal filter query performance. Written by Ilaria Petreti, Information Retrieval/Machine Learning Engineer at Sease.


Solr 8 reaches End-Of-Life

News: 25 October 2024

With Lucene 10 having been released, and therefore Lucene 8 reaching EOL, the Apache Lucene and Solr PMCs are no longer able to provide new releases for Solr 8. Solr 8.11.4 will be the last release of Solr 8. Users are strongly recommended to upgrade to Solr 9 …


CVE-2024-45216: Apache Solr: Authentication bypass possible using a fake URL Path ending

Security: 14 October 2024

Severity: Critical Versions Affected: Apache Solr 5.3.0 before 8.11.4 Apache Solr 9.0.0 before 9.7.0 Description: Improper Authentication vulnerability in Apache Solr. Solr instances using the PKIAuthenticationPlugin, which is enabled by default when Solr Authentication is used, are vulnerable to Authentication bypass. A …


CVE-2024-45217: Apache Solr: ConfigSets created during a backup restore command are trusted implicitly

Security: 14 October 2024

Severity: Moderate Versions Affected: Apache Solr 6.6.0 before 8.11.4 Apache Solr 9.0.0 before 9.7.0 Description: Insecure Default Initialization of Resource vulnerability in Apache Solr. New ConfigSets that are created via a Restore command, which copy a configSet from the backup and give …


Community Over Code NA 2024 Apache Lucene/Solr Birds Of A Feather

14 October 2024

This blog post is a summary of the Apache Lucene/Solr Birds of a Feather from Community Over Code NA 2024 in Denver. Written by Eric Pugh and Stefan Vodita.


Categorical Features in Apache Solr Learning to Rank

9 October 2024

Let's see the available learning to rank Apache Solr features with a focus on categorical features and how to manage them. Written by Anna Ruggero, R&D Software Engineer at Sease.


Apache Solr™ 8.11.4 available

News: 24 September 2024

The Lucene and Solr PMCs are pleased to announce the release of Apache Solr 8.11.4. Solr is the blazing-fast, open source, multi-modal search platform built on Apache Lucene. It powers full-text, analytics, and geospatial search at many of the world's largest organizations. Other major features include Kubernetes and …