CVE-2022-40896 Pygments vulnerable to ReDoS
Attackers can cause denial of service in applications using Pygments via a ReDoS vulnerability in the Smithy lexer.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-40896?
CVE-2022-40896 is a medium-severity denial of service vulnerability in n/a, published on 19 Jul 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A ReDoS issue was discovered in pygments/lexers/smithy.py in pygments through 2.15.0 via SmithyLexer.
Weakness: CWE-434
Which versions are affected by CVE-2022-40896?
3 open source packages ship an affected version, including pygments and Pygments. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pygments PyPI | All versions | 2.15.0 |
pygments PyPI | All versions | 2.15.1 |
Pygments PyPI | All versions | 2.15.0 |
Products include Pygments Pygments.
How do I fix CVE-2022-40896?
Upgrade pygments to a fixed version for your release line: 2.15.0 or 2.15.1.
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-2022-40896 being exploited?
There is no known exploitation of CVE-2022-40896 in the wild and no public exploit code.
Sources
Also known as AZL-27502, AZL-35139, DEBIAN-CVE-2022-40896, GHSA-mrwq-x4v8-fh7p, MGASA-2024-0107, MINI-pvx8-36jq-fh6r and 7 more.