CVE-2024-24753: Bref enable serverless PHP on AWS Lambda

Q: How do I fix CVE-2024-24753?

bref: upgrade to 2.1.13. Exact commands for each OS are on this page.

Q: Is CVE-2024-24753 being exploited?

CVE-2024-24753 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-2024-24753 affect?

CVE-2024-24753 affects bref. Severity is medium (CVSS 4.8). Bref enable serverless PHP on AWS Lambda. When Bref is used in combination with an API Gateway with the v2 format, it does not handle multiple values headers. If PHP generates a response with two headers having the same key but different va

Q: How urgent is CVE-2024-24753?

Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

MEDIUM 4.8REMOTEWATCHLISTUPGRADE

CVE-2024-24753 is a medium-severity flaw (CVSS 4.8) affecting bref. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bref enable serverless PHP on AWS Lambda. When Bref is used in combination with an API Gateway with the v2 format, it does not handle multiple values headers. If PHP generates a response with two headers having the same key but different values only the latest one is kept. If an application relies on multiple headers with the same key being set for security reasons, then Bref would lower the application security. For example, if an application se

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-436
Published	2024-02-01
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: mnapoli

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

Am I affected?

Timeline

2024-02-01 16:17 UTCPublished CVE record published
2026-06-17 07:14 UTCUpdated Record last modified

mnapoli bref UPGRADE

Affected: < 2.1.13

Fixed in: 2.1.13

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.1.13 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bref

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-2024-24753?

bref: upgrade to 2.1.13. Exact commands for each OS are on this page.

Is CVE-2024-24753 being exploited?

CVE-2024-24753 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-2024-24753 affect?

CVE-2024-24753 affects bref. Severity is medium (CVSS 4.8). Bref enable serverless PHP on AWS Lambda. When Bref is used in combination with an API Gateway with the v2 format, it does not handle multiple values headers. If PHP generates a response with two headers having the same key but different va

How urgent is CVE-2024-24753?

Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

PHP vulnerabilities · AWS vulnerabilities

Related CVEs

CVE-2024-29186 MEDIUM 5.3 UPGRADE Bref is an open-source project that helps users go serverless on Amazon Web Services with PHP
CVE-2024-24754 LOW 3.7 UPGRADE Bref enable serverless PHP on AWS Lambda
CVE-2024-24752 MEDIUM 6.5 UPGRADE Bref enable serverless PHP on AWS Lambda

References

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