CVE-2026-84968— Heap out-of-bounds read via corrupt nested BSON in field path error message
Quick assessment
Affected
MongoDB PHP Driver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
MongoDB PHP Driver是美国MongoDB公司开源的一个数据库驱动程序。 MongoDB PHP Driver 1.15.0至1.21.8之前版本和2.0.0至2.5.1之前版本存在缓冲区错误漏洞，该漏洞源于BSON解码组件存在越界读取，可能导致未经身份验证的一方提供特制输入时，将少量相邻进程内存复制到返回给应用程序代码的错误消息中，造成有限内存内容泄露。
Possible ATT&CK Techniques 1 AI
T1041 · Exfiltration Over C2 ChannelAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MongoDB | PHP Driver | 1.15.0< 1.21.8 |
affected |
2.0.0< 2.1.9 |
affected | ||
2.2.0< 2.5.1 |
affected |
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I. Basic Information for CVE-2026-84968
Vulnerability Information
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Vulnerability Title
Heap out-of-bounds read via corrupt nested BSON in field path error message
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB PHP Driver 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB PHP Driver是美国MongoDB公司开源的一个数据库驱动程序。 MongoDB PHP Driver 1.15.0至1.21.8之前版本和2.0.0至2.5.1之前版本存在缓冲区错误漏洞，该漏洞源于BSON解码组件存在越界读取，可能导致未经身份验证的一方提供特制输入时，将少量相邻进程内存复制到返回给应用程序代码的错误消息中，造成有限内存内容泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| MongoDB | PHP Driver | 1.15.0 ~ 1.21.8 | - |
|
II. Public POCs for CVE-2026-84968
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-84968 (1)
Same Patch Batch · MongoDB · 2026-09-03 · 10 CVEs total
| CVE-2026-84971 | 6.5 MEDIUM | Persistent client crash loop via undersized FLE2 insert-update ciphertext in decryption pa |
| CVE-2026-84970 | 6.2 MEDIUM | Heap over-read or silent misparse via 32-bit truncation of JSON length in BSON JSON parser |
| CVE-2026-84964 | 5.9 MEDIUM | Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS cli |
| CVE-2026-84963 | 5.3 MEDIUM | Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON |
| CVE-2026-84965 | 5.1 MEDIUM | Heap write primitive via size round-up wrap during JSON parsing on 32-bit builds |
| CVE-2026-84966 | 5.1 MEDIUM | BSON element injection via NUL-embedded document keys in builder append |
| CVE-2026-84967 | 4.3 MEDIUM | Arbitrary command execution via shell-expanded connection string in Launch MongoDB Shell t |
| CVE-2026-84962 | 4.2 MEDIUM | Authenticated KMS request forgery via CRLF injection in GCP key identifier strings |
| CVE-2026-84969 | 3.7 LOW | Heap overflow via truncated base64 encoding of binary fields in length-limited JSON output |
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V. Comments for CVE-2026-84968
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