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CVE-2026-87874

Community.general: community.general: memcached cache plugin deserializes untrusted pickle data from memcached, enabling cache-poisoning remote code execution on the ansible controller

8.1 High

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.72%Up 0.3 points since Sep 10, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.1

Community.general: community.general: memcached cache plugin deserializes untrusted pickle data from memcached, enabling cache-poisoning remote code execution on the ansible controller

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Record
CVE-2026-87874
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
EUVDEUVD-2026-75115 8.1

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Record
EUVD-2026-75115
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-9xm7-6q66-g534 8.1

A flaw was found in the memcached cache plugin of the community.general Ansible collection....

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Record
GHSA-9xm7-6q66-g534
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
NVD 8.1

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Record
CVE-2026-87874
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
OSVDEBIAN-CVE-2026-87874 8.1

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Record
DEBIAN-CVE-2026-87874
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-87874 8.1

A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.

Record
UBUNTU-CVE-2026-87874
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ansible
Debian:12
All versions, plus listed versions
10.0.0+dfsg-110.0.1+dfsg-110.1.0+dfsg-110.5.0+dfsg-110.5.0+dfsg-2
Show 25 moreShow less
10.6.0+dfsg-111.1.0+dfsg-111.2.0+dfsg-112.0.0+dfsg-112.0.0~a1+dfsg-112.0.0~a2+dfsg-112.0.0~a4+dfsg-112.0.0~a6+dfsg-112.0.0~b1+dfsg-112.0.0~b2+dfsg-112.0.0~b3+dfsg-112.0.0~b5+dfsg-112.2.0+dfsg-113.1.0+dfsg-113.4.0+dfsg-114.0.0+dfsg-114.0.0~a4+dfsg-114.4.0+dfsg-17.3.0+dfsg-17.7.0+dfsg-17.7.0+dfsg-27.7.0+dfsg-37.7.0+dfsg-3+deb12u19.4.0+dfsg-19.5.1+dfsg-1
None known
ansible
Debian:13
All versions, plus listed versions
12.0.0+dfsg-0+deb13u112.0.0+dfsg-112.0.0~a6+dfsg-112.0.0~b1+dfsg-112.0.0~b2+dfsg-1
Show 9 moreShow less
12.0.0~b3+dfsg-112.0.0~b5+dfsg-0+deb13u112.0.0~b5+dfsg-112.2.0+dfsg-113.1.0+dfsg-113.4.0+dfsg-114.0.0+dfsg-114.0.0~a4+dfsg-114.4.0+dfsg-1
None known
ansible
Debian:14
All versions, plus listed versions
12.0.0+dfsg-112.0.0~a6+dfsg-112.0.0~b1+dfsg-112.0.0~b2+dfsg-112.0.0~b3+dfsg-1
Show 7 moreShow less
12.0.0~b5+dfsg-112.2.0+dfsg-113.1.0+dfsg-113.4.0+dfsg-114.0.0+dfsg-114.0.0~a4+dfsg-114.4.0+dfsg-1
None known
ansible
Ubuntu:Pro:14.04:LTS
All versions, plus listed versions
1.1+dfsg-11.3.4+dfsg-11.4.0+dfsg-11.4.1+dfsg-11.4.3+dfsg-1
Show 5 moreShow less
1.4.4+dfsg-11.5.4+dfsg-11.5.4+dfsg-1ubuntu0.1~esm11.5.4+dfsg-1ubuntu0.1~esm21.5.4+dfsg-1ubuntu0.1~esm3
None known
ansible
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
1.9.2+dfsg-21.9.4-12.0.0.2-22.0.0.2-2ubuntu12.0.0.2-2ubuntu1.1
Show 8 moreShow less
2.0.0.2-2ubuntu1.22.0.0.2-2ubuntu1.32.0.0.2-2ubuntu1.3+esm12.0.0.2-2ubuntu1.3+esm22.0.0.2-2ubuntu1.3+esm32.0.0.2-2ubuntu1.3+esm42.0.0.2-2ubuntu1.3+esm52.0.0.2-2ubuntu1.3+esm6
None known
ansible
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
2.3.1.0+dfsg-22.5.0+dfsg-12.5.1+dfsg-12.5.1+dfsg-1ubuntu0.12.5.1+dfsg-1ubuntu0.1+esm1
Show 4 moreShow less
2.5.1+dfsg-1ubuntu0.1+esm22.5.1+dfsg-1ubuntu0.1+esm32.5.1+dfsg-1ubuntu0.1+esm42.5.1+dfsg-1ubuntu0.1+esm5
None known
ansible
Ubuntu:Pro:20.04:LTS
All versions, plus listed versions
2.8.3+dfsg-12.8.6+dfsg-12.9.2+dfsg-12.9.4+dfsg-12.9.6+dfsg-12.9.6+dfsg-1ubuntu0.1~esm12.9.6+dfsg-1ubuntu0.1~esm22.9.6+dfsg-1ubuntu0.1~esm3
None known
ansible-core
Ubuntu:22.04:LTS
All versions, plus listed versions
2.12.0-12.12.0-1ubuntu0.1
None known
ansible
Ubuntu:Pro:22.04:LTS
All versions, plus listed versions
2.10.7+merged+base+2.10.8+dfsg-12.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm12.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm4
None known
ansible
Ubuntu:24.04:LTS
All versions, plus listed versions
7.7.0+dfsg-17.7.0+dfsg-39.2.0+dfsg-0ubuntu49.2.0+dfsg-0ubuntu5
None known
Show 5 moreShow less
Affected packages
PackageAffectedFixed
ansible-core
Ubuntu:24.04:LTS
All versions, plus listed versions
2.14.9-22.14.11-12.14.11-22.14.13-12.16.3-0ubuntu12.16.3-0ubuntu2
None known
ansible
Ubuntu:26.10
All versions, plus listed versions
13.1.0+dfsg-1ubuntu113.4.0+dfsg-1
None known
ansible-core
Ubuntu:26.10
All versions, plus listed versions
2.20.1-12.21.1~rc1-12.21.1~rc1-22.21.1~rc1-2ubuntu12.22.0~beta2-1
None known
ansible
Ubuntu:26.04:LTS
All versions, plus listed versions
12.0.0~b1+dfsg-112.0.0+dfsg-112.2.0+dfsg-113.1.0+dfsg-113.1.0+dfsg-1ubuntu1
None known
ansible-core
Ubuntu:26.04:LTS
All versions, plus listed versions
2.19.0-1ubuntu12.19.4-12.20.1-1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-87874 is a high vulnerability (CVSS 8.1) in Red Hat Ceph Storage 5, published September 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.72%, the 54th percentile. No source names a fixed version.

References

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