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Public proof of conceptFix available

CVE-2024-28757

A public proof of concept exists; no exploitation attested.

  • Published2024-03-10
  • WeaknessCWE-776

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

libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).

Timeline

dates in UTC
  1. 2024-03-1005:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
38.x= 38no fix published
39.x= 39no fix published
40.x= 40no fix published
Libexpat project libexpat
BranchAffectedFixed in
2.6< 2.6.22.6.2
Netapp active iq unified manager
BranchAffectedFixed in
—all versionsno fix published

11 more products 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

  • coin3Ubuntu:Pro:18.04:LTSall versions · no fixed version listedand 4 other packages
  • expatWolfiall versions · fixed in 2.6.2-r0
  • expatUbuntu:Pro:20.04:LTSall versions · no fixed version listedand 3 other packages
  • expatUbuntu:22.04:LTSall versions · fixed in 2.4.7-1ubuntu0.3
  • expatTuxCare:RHEL:7all versions · fixed in 2.1.0-15.0.7.el7_9.tuxcare.els1and 2 other packages
  • expatTuxCare:OracleLinux:7all versions · fixed in 2.1.0-15.0.7.el7_9.tuxcare.els1and 2 other packages
  • expatTuxCare:CentOS:8.5all versions · fixed in 2.5.0-1.el8.tuxcare.els1and 2 other packages
  • expatTuxCare:CentOS:8.4all versions · fixed in 2.5.0-1.el8.tuxcare.els1and 2 other packages

84 more package ranges on OSV.dev

Vendor advisories

  • CVE-2024-28757 Red Hat Product Security139 products fixed

    expat: XML Entity Expansion

  • RHSA-2026:7243 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.19.28 bug fix and security update

  • RHSA-2026:7239 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.13.65 bug fix and security update

  • RHSA-2026:5087 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.14.63 bug fix and security update

  • RHSA-2026:4480 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.17.51 bug fix and security update

  • RHSA-2026:4465 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.16.58 bug fix and security update

11 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:7243 · 4 productsFor OpenShift Container Platform 4.19 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  2. Vendor fix Red Hat Product Security RHSA-2026:7239 · 1 productFor OpenShift Container Platform 4.13 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  3. Vendor fix Red Hat Product Security RHSA-2026:5087 · 4 productsFor OpenShift Container Platform 4.14 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  4. Vendor fix Red Hat Product Security RHSA-2026:4480 · 4 productsFor OpenShift Container Platform 4.17 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  5. Vendor fix Red Hat Product Security RHSA-2026:4465 · 4 productsFor OpenShift Container Platform 4.16 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  6. Vendor fix Red Hat Product Security RHSA-2026:4419 · 4 productsFor OpenShift Container Platform 4.15 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2024-03-10
Last Modified
2026-10-15
NVD status
Modified
GitHub Advisory
GHSA-ch5v-h69f-mxc8

Frequently asked questions

What is CVE-2024-28757?

libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).

Is CVE-2024-28757 actively exploited?

Active exploitation of CVE-2024-28757 has not been confirmed. Its EPSS score was 2.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-28757?

CVE-2024-28757 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record