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CVE-2023-29530

17
FAUCET Score

CVE-2023-29530 is a vulnerability in Laminas Diactoros, a PSR HTTP Message implementation, affecting versions 2.18.0 and prior, 2.19.0-2.25.0. It allows an attacker to cause an invalid HTTP message by injecting newlines into header keys or values, leading to denial of service or application errors. The vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low complexity, requiring low privileges, and resulting in high availability impact. There is currently no evidence of active exploitation, no public exploit code available, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.18.1CPE matchmatch criteria
cpe:2.3:a:getlaminas:laminas-diactoros:*:*:*:*:*:*:*:*
2.19.0CPE matchmatch criteria
cpe:2.3:a:getlaminas:laminas-diactoros:2.19.0:*:*:*:*:*:*:*
2.20.0CPE matchmatch criteria
cpe:2.3:a:getlaminas:laminas-diactoros:2.20.0:*:*:*:*:*:*:*
2.21.0CPE matchmatch criteria
cpe:2.3:a:getlaminas:laminas-diactoros:2.21.0:*:*:*:*:*:*:*
2.22.0CPE matchmatch criteria
cpe:2.3:a:getlaminas:laminas-diactoros:2.22.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.97%
Probability of exploitation in next 30 days
EPSS Percentile
58.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0097 is in the 71st percentile among its peer group of 21,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.25.2
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.18.1
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.19.1
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.20.1
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.21.1
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.22.1
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.23.1
composerpatch availablevia ghsa
Product: laminas/laminas-diactorosFixed in: 2.24.2
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-xv3h-4844-9h36high

HTTP Multiline Header Termination

Apr 24, 2023

References

github.com / advisories/GHSA-wxmh-65f7-jcvw
Not Applicable
github.com / laminas/laminas-diactoros/security/advisories/GHSA-xv3h-4844-9h36
Vendor Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/BPW54QK7ISDALPLP2CKODU4ZIVRYS336
Mailing ListThird Party Advisory