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VulnerabilityPublished

CVE-2026-8202: MongoDB Server · Unthrottled Resource Allocation

Affects MongoDB ServerSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium · fixed in 8.3.2 : update MongoDB Server when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 8.3.2, 8.2.9, 8.0.23 +1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade MongoDB Server to 8.3.2, 8.2.9, 8.0.23 or 7.0.34.

Affected software

ProductAffectedFixed in
MongoDB, Inc.MongoDB ServerAffected
  • >=8.3 <8.3.2
Fixed in
  • 8.3.2
MongoDB, Inc.MongoDB ServerAffected
  • >=8.2 <8.2.9
Fixed in
  • 8.2.9
MongoDB, Inc.MongoDB ServerAffected
  • >=8.0 <8.0.23
Fixed in
  • 8.0.23
MongoDB, Inc.MongoDB ServerAffected
  • >=7.0 <7.0.34
Fixed in
  • 7.0.34

AI-suggested

If you cannot patch yet, consider limiting aggregation permissions to trusted users only and monitor server performance for unusual CPU usage patterns related to aggregation queries involving $trim, $ltrim, and $rtrim operators. Avoid processing large input strings with densely populated character masks in these operators where possible.

Description

Using a densely populated chars mask and a large input string in the MongoDB aggregation operators $trim, $ltrim, and $rtrim, an authenticated user with aggregation permissions can pin CPU utilization at 100% for an extended period of time. This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

References

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