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CVE-2026-6811

PHP Stack Exhaustion

6.0 MediumFix available

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.37%Up 0.3 points since May 15, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.0

PHP Stack Exhaustion

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
CVE-2026-6811
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-674
Updated
2026-11-02
EUVDEUVD-2026-30490 6.0

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
EUVD-2026-30490
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-vc69-vr6f-4x67 6.0

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when...

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
GHSA-vc69-vr6f-4x67
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-674
Updated
2026-11-02
NVD 6.0

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
CVE-2026-6811
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-674
Updated
2026-11-02
OSV 6.0

PHP Stack Exhaustion

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
CVE-2026-6811
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-674
Updated
2026-11-02
OSVDEBIAN-CVE-2026-6811 7.5

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
DEBIAN-CVE-2026-6811
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-6811 6.0

Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.

Record
UBUNTU-CVE-2026-6811
CVSS 4.0
6.0 MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
php-mongodb
Debian:12
 All versions, plus listed versions
1.15.0+1.11.1+1.9.2+1.7.5-11.19.3-11.19.4-21.19.4-3~exp21.19.4-3~exp3
Show 7 moreShow less
1.19.4-3~exp41.20.0-11.20.1-11.21.0-12.0.0-12.1.0-12.5.3-1
 None known
php-mongodb
Debian:13
 before 2.0.0-1+deb13u1, plus listed versions
2.0.0-1
2.0.0-1+deb13u1
php-mongodb
Debian:14
 before 2.5.3-1, plus listed versions
2.0.0-12.1.0-1
2.5.3-1
php-mongodb
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.1.2-2~ubuntu11.1.5-1~build1
 None known
php-mongodb
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.2.3-1build11.3.4-1build1
 None known
php-mongodb
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.5.5-1build11.6.1-41.6.1-4build1
 None known
php-mongodb
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.9.0+1.7.5-2build21.11.1+1.9.2+1.7.5-41.12.0+1.9.2+1.7.5-31.12.0+1.9.2+1.7.5-4
 None known
php-mongodb
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.15.0+1.11.1+1.9.2+1.7.5-1build11.15.0+1.11.1+1.9.2+1.7.5-1ubuntu11.15.0+1.11.1+1.9.2+1.7.5-1ubuntu21.15.0+1.11.1+1.9.2+1.7.5-1ubuntu3
 None known
php-mongodb
Ubuntu:25.10
 All versions, plus listed versions
1.21.0-12.0.0-12.1.0-1
 None known
php-mongodb
Ubuntu:26.10
 All versions, plus listed versions
2.1.7-0ubuntu12.1.7-0ubuntu2
 None known
php-mongodb
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.1.0-12.1.7-0ubuntu1
 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-2026-6811 is a medium vulnerability (CVSS 6.0) in Mongodb Php Driver, published May 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 30th percentile. Fixed in php-mongodb 2.0.0-1+deb13u1.

References

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