CVE-2022-42969: The py library through 1.11.0 for Python allows remote attackers to conduct a ReDoS (Regular expression Denial

Q: How do I fix CVE-2022-42969?

py: upgrade to newer than 1.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-42969 being exploited?

CVE-2022-42969 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-2022-42969 affect?

CVE-2022-42969 affects py. Severity is medium (CVSS 5.3). The py library through 1.11.0 for Python allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data, because the InfoSvnCommand argument is mishandled. Note: T

Q: How urgent is CVE-2022-42969?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2022-42969 is a medium-severity flaw (CVSS 5.3) affecting py. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The py library through 1.11.0 for Python allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data, because the InfoSvnCommand argument is mishandled. Note: This has been disputed by multiple third parties as not being reproduceable and they argue this is not a valid vulnerability.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-1333
Published	2022-10-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pytest

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

Am I affected?

Timeline

2022-10-16 06:15 UTCPublished CVE record published
2026-06-17 05:05 UTCUpdated Record last modified

pytest py UPGRADE

Affected: <= 1.11.0

Fixed in: newer than 1.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.11.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade py

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-2022-42969?

py: upgrade to newer than 1.11.0. Exact commands for each OS are on this page.

Is CVE-2022-42969 being exploited?

CVE-2022-42969 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-2022-42969 affect?

CVE-2022-42969 affects py. Severity is medium (CVSS 5.3). The py library through 1.11.0 for Python allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data, because the InfoSvnCommand argument is mishandled. Note: T

How urgent is CVE-2022-42969?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2020-29651 HIGH 7.5 UPGRADE MITIGATE A denial of service via regular expression in the py.path.svnwc component of py (aka python-py) through 1.9.0

References

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