CVE-2020-26303 GHSL-2020-289: Regular Expression Denial of Service (ReDoS) in insane
An attacker can cause a denial of service in applications using the insane HTML sanitizer library via specially crafted input triggering ReDoS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-26303?
CVE-2020-26303 is a high-severity denial of service vulnerability in bevacqua insane, published on 26 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
insane is a whitelist-oriented HTML sanitizer. Versions 2.6.2 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.
Weakness: CWE-1333
Which versions are affected by CVE-2020-26303?
2 open source packages ship an affected version, including insane. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
insane npm | All versions to 2.6.2 | None |
insane npm | All versions to 2.6.2 | None |
Products include Bevacqua Insane.
How do I fix CVE-2020-26303?
No fix has been published for CVE-2020-26303 yet. Limit exposure of the affected software until one is available.
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-2020-26303 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-26303 exists.
Sources
Also known as GHSA-w455-mfq9-hf74.