CVE-2022-40896: A ReDoS issue was discovered in pygments/lexers/smithy.py in pygments through 2.15.0 via SmithyLexer.

Q: How do I fix CVE-2022-40896?

pygments: upgrade to newer than 2.15.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-40896 being exploited?

CVE-2022-40896 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-40896 affect?

CVE-2022-40896 affects pygments. Severity is medium (CVSS 5.5). A ReDoS issue was discovered in pygments/lexers/smithy.py in pygments through 2.15.0 via SmithyLexer.

Q: How urgent is CVE-2022-40896?

Priority 35/100. Public exploit reference

Routine

MEDIUM 5.5UPGRADE

CVE-2022-40896 is a medium-severity flaw (CVSS 5.5) affecting pygments. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A ReDoS issue was discovered in pygments/lexers/smithy.py in pygments through 2.15.0 via SmithyLexer.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-07-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pygments

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-19 15:15 UTCPublished CVE record published
2026-06-17 05:02 UTCUpdated Record last modified

pygments pygments UPGRADE

Affected: <= 2.15.0

Fixed in: newer than 2.15.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pygments || rpm -q pygments || pygments --version

2. UPGRADE to newer than 2.15.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pygments

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pygments

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-40896?

pygments: upgrade to newer than 2.15.0. Exact commands for each OS are on this page.

Is CVE-2022-40896 being exploited?

CVE-2022-40896 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-40896 affect?

CVE-2022-40896 affects pygments. Severity is medium (CVSS 5.5). A ReDoS issue was discovered in pygments/lexers/smithy.py in pygments through 2.15.0 via SmithyLexer.

How urgent is CVE-2022-40896?

Priority 35/100. Public exploit reference

References

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