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CVE-2024-55638

Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-008

9.8 CriticalFix available

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.98%Up 0.9 points since Dec 10, 2024
90%50%10%1%

What each source reports

CVE List Score used 9.8

Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-008

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Record
CVE-2024-55638
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-915
Updated
2026-11-02
EUVDEUVD-2024-3473 9.8

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Record
EUVD-2024-3473
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-gvf2-2f4g-jqf4 7.5

Drupal core contains a potential PHP Object Injection vulnerability

Drupal core contains a potential PHP Object Injection vulnerability that (if combined with another exploit) could lead to Remote Code Execution. It is not directly exploitable.

This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize(). There are no such known exploits in Drupal core.

To help protect against this potential vulnerability, some additional checks have been added to Drupal core's database code. If you use a third-party database driver, check the release notes for additional configuration steps that may be required in certain cases.

This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Record
GHSA-gvf2-2f4g-jqf4
CVSS 4.0
7.5 HighCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502, CWE-915
Updated
2026-11-02
GitHub AdvisoriesGHSA-6ccv-8fgf-cjpw No score

Drupal core Denial of Service vulnerability

The Comment module allows users to reply to comments. In certain cases, an attacker could make comment reply requests that would trigger a denial of service (DOS).

Sites that do not use the Comment module are not affected.

Record
GHSA-6ccv-8fgf-cjpw
Updated
2026-11-02
NVD 9.8

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Record
CVE-2024-55638
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-915, CWE-502
Updated
2026-11-02
OSV 9.8

Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-008

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Record
CVE-2024-55638
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-915
Updated
2026-11-02
Show 7 moreShow less
OSVGHSA-gvf2-2f4g-jqf4 7.5

Drupal core contains a potential PHP Object Injection vulnerability

Drupal core contains a potential PHP Object Injection vulnerability that (if combined with another exploit) could lead to Remote Code Execution. It is not directly exploitable.

This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize(). There are no such known exploits in Drupal core.

To help protect against this potential vulnerability, some additional checks have been added to Drupal core's database code. If you use a third-party database driver, check the release notes for additional configuration steps that may be required in certain cases.

This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Record
GHSA-gvf2-2f4g-jqf4
CVSS 4.0
7.5 HighCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502, CWE-915
Updated
2026-11-02
OSVUBUNTU-CVE-2024-55638 9.8

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9. Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Record
UBUNTU-CVE-2024-55638
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVBIT-drupal-2024-55638 No score

Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-008

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Record
BIT-drupal-2024-55638
Updated
2026-11-02
OSVCLSA-2026-1776214337 No score

TuxCare security update for drupal/core (11 CVEs)

TuxCare rebuilt drupal/core to address 11 CVEs. Fixed in 9.5.11-p1+tuxcare.

Record
CLSA-2026-1776214337
Updated
2026-11-02
OSVCLSA-2026-1784682869 No score

TuxCare security update for drupal/core (21 CVEs)

TuxCare rebuilt drupal/core to address 21 CVEs. Fixed in 8.9.20-p1+tuxcare.

Record
CLSA-2026-1784682869
Updated
2026-11-02
OSVDRUPAL-CORE-2024-008 No score

Drupal core contains a potential PHP Object Injection vulnerability that (if combined with another exploit) could lead to Remote Code Execution. It is not directly exploitable.

This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize(). There are no such known exploits in Drupal core.

To help protect against this potential vulnerability, some additional checks have been added to Drupal core's database code. If you use a third-party database driver, check the release notes for additional configuration steps that may be required in certain cases.

Record
DRUPAL-CORE-2024-008
Updated
2026-11-02
OSVGHSA-6ccv-8fgf-cjpw No score

Drupal core Denial of Service vulnerability

The Comment module allows users to reply to comments. In certain cases, an attacker could make comment reply requests that would trigger a denial of service (DOS).

Sites that do not use the Comment module are not affected.

Record
GHSA-6ccv-8fgf-cjpw
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
drupal/core
Packagist
8.0.0 up to 10.1.8
10.1.8
drupal/core
Packagist
10.2.0 up to 10.2.2
10.2.2
drupal/core
Packagist
8.8.0 up to 10.2.11
10.2.11
drupal/core
Packagist
10.3.0 up to 10.3.9
10.3.9
drupal/core
Packagist
7.0 up to 7.102
7.102
drupal/core-recommended
Packagist
8.8.0 up to 10.2.11
10.2.11
drupal/core-recommended
Packagist
10.3.0 up to 10.3.9
10.3.9
drupal/core-recommended
Packagist
7.0 up to 7.102
7.102
drupal/drupal
Packagist
8.8.0 up to 10.2.11
10.2.11
drupal/drupal
Packagist
10.3.0 up to 10.3.9
10.3.9
Show 15 moreShow less
Affected packages
PackageAffectedFixed
drupal/drupal
Packagist
7.0 up to 7.102
7.102
drupal
Bitnami
7.0.0 up to 10.3.9
10.3.9
drupal/core
TuxCare:Packagist
From an advisory covering 10 CVEs
9.5.11 up to 9.5.11-p1+tuxcare
9.5.11-p1+tuxcare
drupal/core
TuxCare:Packagist
From an advisory covering 20 CVEs
8.9.20 up to 8.9.20-p1+tuxcare
8.9.20-p1+tuxcare
drupal/core
Packagist
8.0.0 up to 10.2.11, 10.3.0 up to 10.3.9, plus listed versions
10.0.010.0.0-alpha110.0.0-alpha210.0.0-alpha310.0.0-alpha4
Show 45 moreShow less
10.0.0-alpha510.0.0-alpha610.0.0-alpha710.0.0-beta110.0.0-beta210.0.0-rc110.0.0-rc210.0.0-rc310.0.110.0.1010.0.1110.0.210.0.310.0.410.0.510.0.610.0.710.0.810.0.910.1.010.1.0-alpha110.1.0-beta110.1.0-rc110.1.110.1.210.1.310.1.410.1.510.1.610.1.710.1.810.2.010.2.0-alpha110.2.0-beta110.2.0-rc110.2.110.2.1010.2.210.2.310.2.410.2.510.2.610.2.710.2.810.2.9
10.2.1110.3.9
drupal/core
Packagist
8.0.0 up to 10.1.8, plus listed versions
10.0.010.0.0-alpha110.0.0-alpha210.0.0-alpha310.0.0-alpha4
Show 45 moreShow less
10.0.0-alpha510.0.0-alpha610.0.0-alpha710.0.0-beta110.0.0-beta210.0.0-rc110.0.0-rc210.0.0-rc310.0.110.0.1010.0.1110.0.210.0.310.0.410.0.510.0.610.0.710.0.810.0.910.1.010.1.0-alpha110.1.0-beta110.1.0-rc110.1.110.1.210.1.310.1.410.1.510.1.610.1.78.0.18.0.28.0.38.0.48.0.58.0.68.1.08.1.0-beta18.1.0-beta28.1.0-rc18.1.18.1.108.1.28.1.38.1.4
10.1.8
drupal/core
Packagist
10.2.0 up to 10.2.2, plus listed versions
10.2.1
10.2.2
drupal/core
Packagist
8.8.0 up to 10.2.11, plus listed versions
10.0.010.0.0-alpha110.0.0-alpha210.0.0-alpha310.0.0-alpha4
Show 45 moreShow less
10.0.0-alpha510.0.0-alpha610.0.0-alpha710.0.0-beta110.0.0-beta210.0.0-rc110.0.0-rc210.0.0-rc310.0.110.0.1010.0.1110.0.210.0.310.0.410.0.510.0.610.0.710.0.810.0.910.1.010.1.0-alpha110.1.0-beta110.1.0-rc110.1.110.1.210.1.310.1.410.1.510.1.610.1.710.1.810.2.010.2.0-alpha110.2.0-beta110.2.0-rc110.2.110.2.1010.2.210.2.310.2.410.2.510.2.610.2.710.2.810.2.9
10.2.11
drupal/core
Packagist
10.3.0 up to 10.3.9, plus listed versions
10.3.110.3.210.3.310.3.410.3.510.3.610.3.710.3.8
10.3.9
drupal/core-recommended
Packagist
8.8.0 up to 10.2.11, plus listed versions
10.0.010.0.0-alpha110.0.0-alpha210.0.0-alpha310.0.0-alpha4
Show 45 moreShow less
10.0.0-alpha510.0.0-alpha610.0.0-alpha710.0.0-beta110.0.0-beta210.0.0-rc110.0.0-rc210.0.0-rc310.0.110.0.1010.0.1110.0.210.0.310.0.410.0.510.0.610.0.710.0.810.0.910.1.010.1.0-alpha110.1.0-beta110.1.0-rc110.1.110.1.210.1.310.1.410.1.510.1.610.1.710.1.810.2.010.2.0-alpha110.2.0-beta110.2.0-rc110.2.110.2.1010.2.210.2.310.2.410.2.510.2.610.2.710.2.810.2.9
10.2.11
drupal/core-recommended
Packagist
10.3.0 up to 10.3.9, plus listed versions
10.3.110.3.210.3.310.3.410.3.510.3.610.3.710.3.8
10.3.9
drupal/drupal
Packagist
8.8.0 up to 10.2.11, plus listed versions
10.0.010.0.0-alpha110.0.0-alpha210.0.0-alpha310.0.0-alpha4
Show 45 moreShow less
10.0.0-alpha510.0.0-alpha610.0.0-alpha710.0.0-beta110.0.0-beta210.0.0-rc110.0.0-rc210.0.0-rc310.0.110.0.1010.0.1110.0.210.0.310.0.410.0.510.0.610.0.710.0.810.0.910.1.010.1.0-alpha110.1.0-beta110.1.0-rc110.1.110.1.210.1.310.1.410.1.510.1.610.1.710.1.810.2.010.2.0-alpha110.2.0-beta110.2.0-rc110.2.110.2.1010.2.210.2.310.2.410.2.510.2.610.2.710.2.810.2.9
10.2.11
drupal/drupal
Packagist
10.3.0 up to 10.3.9, plus listed versions
10.3.110.3.210.3.310.3.410.3.510.3.610.3.710.3.8
10.3.9
drupal7
Ubuntu:Pro:14.04:LTS
All versions, plus listed versions
7.23-17.24-17.24-27.26-17.26-1ubuntu0.17.26-1ubuntu0.1+esm17.26-1ubuntu0.1+esm27.26-1ubuntu0.1+esm3
None known
drupal7
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
7.38-17.41-17.44-1ubuntu1~16.04.07.44-1ubuntu1~16.04.0+esm17.44-1ubuntu1~16.04.0+esm27.44-1ubuntu1~16.04.0+esm3
None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-55638 is a critical vulnerability (CVSS 9.8) in Drupal, published February 12, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.98%, the 62nd percentile. Fixed in drupal/core 10.1.8.

References

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