CVE-2026-84968
Heap out-of-bounds read via corrupt nested BSON in field path error message
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
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
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Heap out-of-bounds read via corrupt nested BSON in field path error message
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
- Record
CVE-2026-84968- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-70644
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
- Record
EUVD-2026-70644- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-02
NVD
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
- Record
CVE-2026-84968- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
Heap out-of-bounds read via corrupt nested BSON in field path error message
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
- Record
CVE-2026-84968- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-84968
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
- Record
DEBIAN-CVE-2026-84968- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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 - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-84968
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
- Record
UBUNTU-CVE-2026-84968- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
php-mongodbDebian: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 less1.19.4-3~exp41.20.0-11.20.1-11.21.0-12.0.0-12.1.0-12.5.3-1 |
None known |
php-mongodbDebian:13 |
before 2.0.0-1+deb13u1, plus listed versions 2.0.0-1 |
2.0.0-1+deb13u1 |
php-mongodbDebian:14 |
before 2.5.3-1, plus listed versions 2.0.0-12.1.0-1 |
2.5.3-1 |
php-mongodbUbuntu:16.04:LTS |
All versions, plus listed versions 1.1.2-2~ubuntu11.1.5-1~build1 |
None known |
php-mongodbUbuntu:18.04:LTS |
All versions, plus listed versions 1.2.3-1build11.3.4-1build1 |
None known |
php-mongodbUbuntu:20.04:LTS |
All versions, plus listed versions 1.5.5-1build11.6.1-41.6.1-4build1 |
None known |
php-mongodbUbuntu: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-mongodbUbuntu: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-mongodbUbuntu:26.10 |
All versions, plus listed versions 2.1.7-0ubuntu12.1.7-0ubuntu2 |
None known |
php-mongodbUbuntu:26.04:LTS |
All versions, plus listed versions 2.1.0-12.1.7-0ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-84968 is a medium vulnerability (CVSS 6.9) in Mongodb Php Driver, published September 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. Fixed in php-mongodb 2.0.0-1+deb13u1.