Unauthenticated DoS via unbounded request body read
Published Aug 20, 2026 · Updated Aug 20, 2026
Resource exhaustion in FreeIPA in Red Hat Enterprise Linux 7, 8, 9, and 10 allows remote attackers to interrupt service via oversized POST bodies. The public /ipa/i18n_messages handler in ipaserver/rpcserver.py trusts CONTENT_LENGTH and reads that many bytes from wsgi.input into memory before verifying the RPC method, and accepted input is copied again into a BytesIO buffer. Network reachability to the endpoint and the ability to send large POST bodies are sufficient; deployments that already enforce request-body limits reduce the impact to availability through memory pressure, slow responses, worker churn, and possible OOM termination.
Summary
What happened
Resource exhaustion in FreeIPA in Red Hat Enterprise Linux 7, 8, 9, and 10 allows remote attackers to interrupt service via oversized POST bodies. The public /ipa/i18n_messages handler in ipaserver/rpcserver.py trusts CONTENT_LENGTH and reads that many bytes from wsgi.input into memory before verifying the RPC method, and accepted input is copied again into a BytesIO buffer. Network reachability to the endpoint and the ability to send large POST bodies are sufficient; deployments that already enforce request-body limits reduce the impact to availability through memory pressure, slow responses, worker churn, and possible OOM termination.
The record
- CVE
- CVE-2026-73198
- Published
- Aug 20, 2026
- Updated
- Aug 20, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-770, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 20, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo