CVE-2026-70469 Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests
Attackers can cause excessive memory consumption in Apache NiFi by sending crafted HTTP requests with multiple or non-standard Content-Encoding headers, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-70469?
CVE-2026-70469 is a high-severity denial of service vulnerability in Apache Nifi, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Apache NiFi 2.11.0 disabled support for gzip-encoded HTTP requests for the application REST API and rejected requests that included the standard Content-Encoding header indicating gzip encoding. The framework enforcement filter did not check multiple instances of the Content-Encoding header and did not reject non-standard identifiers for gzip encoding, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.12.0 is the recommended mitigation, which disables decompression of gzip-encoded HTTP requests regardless of header number or encoding identifiers.
Weakness: CWE-409
Which versions are affected by CVE-2026-70469?
1 open source package ship an affected version, including nifi. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
nifi Bitnami | From 2.11.0 | 2.12.0 |
Products include Apache Nifi.
How do I fix CVE-2026-70469?
Upgrade nifi to 2.12.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-70469 being exploited?
There is no known exploitation of CVE-2026-70469 in the wild and no public exploit code.
Other vulnerabilities in Apache Nifi
- CVE-2018-1309 Improper Restriction of XML External Entity Reference in Apache NiFi
- CVE-2017-15697 Apache NiFi XSS issue in context path handling
- CVE-2017-5636 Injection in Apache NiFi
- CVE-2026-68981 Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests
- CVE-2023-36542 Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources
Sources
Also known as BIT-nifi-2026-70469, GHSA-56vg-25rp-h2c5, MINI-fhg6-w67w-67h7.