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 states that \r\n\r\n is used to terminate the header list, many servers in the wild will also accept \n\n. This is a follow-up to CVE-2022-24775 where the fix was incomplete. The issue has been patched in versions 1.9.1 and 2.4.5. There are no known workarounds for this vulnerability. Users are advised to upgrade.
Published 2023-04-17 22:15:10
Updated 2024-01-01 01:15:20
Source GitHub, Inc.
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2023-29197

0.26%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 65 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-29197

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.9
3.6
NIST
5.3
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.9
1.4
GitHub, Inc.

CWE ids for CVE-2023-29197

  • Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.
    Assigned by: security-advisories@github.com (Primary)

References for CVE-2023-29197

Products affected by CVE-2023-29197

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