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Public proof of conceptFix available

CVE-2024-2756

A public proof of concept exists; no exploitation attested.

  • Published2024-04-29
  • Fixed in8.3.5 · 8.2.18 · 8.1.28
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Due to an incomplete fix to CVE-2022-31629 https://github.com/advisories/GHSA-c43m-486j-j32p , network and same-site attackers can set a standard insecure cookie in the victim's browser which is treated as a __Host- or __Secure- cookie by PHP applications.

Timeline

dates in UTC
  1. 2024-04-2904:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-2756?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-2756?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV
php
BranchAffectedFixed in
8.3≥ 8.3.0, < 8.3.58.3.5
8.2≥ 8.2.0, < 8.2.188.2.18
8.1< 8.1.288.1.28
libphp
BranchAffectedFixed in
8.3≥ 8.3.0, < 8.3.58.3.5
8.2≥ 8.2.0, < 8.2.188.2.18
8.1< 8.1.288.1.28
php-min
BranchAffectedFixed in
8.3≥ 8.3.0, < 8.3.58.3.5
8.2≥ 8.2.0, < 8.2.188.2.18
8.1< 8.1.288.1.28

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.10.0+3935+28808425and 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.6.0+2750+78feabcband 1 other package
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.6.0+3239+bedf0508and 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.7.3-1.module_el8.10.0+3796+30ed3ef7and 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.7.3-1.module_el8.6.0+2739+efabdb8fand 1 other package
  • libzipAlmaLinux:8all versions · fixed in 1.7.3-1.module_el8.6.0+3061+6878dd1band 1 other package
  • phpAlmaLinux:9all versions · fixed in 8.1.30-1.module_el9.5.0+131+62ecd687and 24 other packages
  • phpAlmaLinux:9all versions · fixed in 8.2.25-1.module_el9.5.0+132+adb0ae7aand 24 other packages

28 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update php to 8.3.5 · 8.2.18 · 8.1.28

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2024-04-29
  • OpenCVESSVC decisionpoc—
  • CNACVSS 3.16.5read 2026-10-23
  • CNAweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score38.1 %read 2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Published
2024-04-29
Last Modified
2026-06-17
NVD status
Deferred

Frequently asked questions

What is CVE-2024-2756?

Due to an incomplete fix to CVE-2022-31629 https://github.com/advisories/GHSA-c43m-486j-j32p , network and same-site attackers can set a standard insecure cookie in the victim's browser which is treated as a __Host- or __Secure- cookie by PHP applications.

Is CVE-2024-2756 actively exploited?

A proof-of-concept exploit exists for CVE-2024-2756, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2024-2756?

CVE-2024-2756 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

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