Vulnerability in Guzzle Psr7
CVE-2023-29197
guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Affected versions are subject to improper header parsing. An attacker could sneak in a newline (\n) into both the header names and values. While the specification state…
EPSS: 0.012 (64.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Guzzle Psr7 — versions < 1.9.1, >= 2.0.0, < 2.4.5
- Guzzlephp Psr-7
- Fedoraproject Fedora — versions 37, 38
Weakness classification (CWE)
Public proof-of-concept exploits
- 20142995/nuclei-templates
- DannyvdSluijs/DannyvdSluijs
- blue-goheimochi/phpcon-nagoya2025
- common-repository/amazon-s3-and-cloudfront
- common-repository/wp-ses
- deliciousbrains/wp-amazon-s3-and-cloudfront
- deliciousbrains/wp-offload-ses-lite
- elifesciences/github-repo-security-alerts
- karimhabush/cyberowl
- zerosickk/amazon-s3-and-cloudfront
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Not Applicable)
- security-advisories@github.com (x_refsource_MISC, Not Applicable)
- security-advisories@github.com (Technical Description, x_refsource_MISC)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com
Frequently asked questions
- What is CVE-2023-29197?
- CVE-2023-29197 is a medium-severity vulnerability in Guzzle Psr7, classified under CWE-436. CVSS score: 5.3/10. Published 2023-04-17.
- How severe is CVE-2023-29197?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-29197 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.