CVE-2026-49091 Improper Output Neutralization for Logs in Kibana Leading to Log Injection
Attackers can inject control sequences into Kibana logs, altering displayed data in terminals, requiring a patch to neutralize output.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-49091?
CVE-2026-49091 is a high-severity vulnerability in Elastic Kibana, published on 1 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Improper Output Neutralization for Logs (CWE-117) in Kibana can lead to log injection via Log Injection-Tampering-Forging (CAPEC-93). An attacker can supply specially crafted input that is written to log files without proper neutralization. When the log files are subsequently viewed in a terminal that interprets control sequences, the injected content may alter the displayed log data.
Weakness: CWE-116
Which versions are affected by CVE-2026-49091?
It affects 1 product.
Products include Elastic Kibana.
How do I fix CVE-2026-49091?
No fix has been published for CVE-2026-49091 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-49091 being exploited?
There is no known exploitation of CVE-2026-49091 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as GHSA-787j-ggjh-rhm6.