CVE-2022-39280 — dparse is a parser for Python dependency files
dparse is a parser for Python dependency files. dparse in versions before 0.5.2 contain a regular expression that is vulnerable to a Regular Expression Denial of Service. All the users parsing index server URLs with dparse are impacted by this vulnerability. A patch has been appl
Published
2022-10-06T00:00:00.000Z
Last modified
2025-04-23T16:52:14.285Z
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
01What is this vulnerability?
dparse is a parser for Python dependency files. dparse in versions before 0.5.2 contain a regular expression that is vulnerable to a Regular Expression Denial of Service. All the users parsing index server URLs with dparse are impacted by this vulnerability. A patch has been applied in version `0.5.2`, all the users are advised to upgrade to `0.5.2` as soon as possible. Users unable to upgrade…
02Affected products
| Vendor | Product | Versions |
|---|
| pyupio | dparse | < 0.5.2 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2022-10-06T00:00:00.000Z
- Last modified: 2025-04-23T16:52:14.285Z
09References
- owasp.org — https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_R…
- github.com — https://github.com/pyupio/dparse/security/advisories/GHSA-8fg9-p83m-x5pq
- github.com — https://github.com/pyupio/dparse/commit/8c990170bbd6c0cf212f1151e9025486556062d5
- github.com — https://github.com/pyupio/dparse/commit/d87364f9db9ab916451b1b036cfeb039e726e614
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