CVE-2026-1990Public exploit

Application crash via invalid String wrapper copy

Published Feb 6, 2026 · Updated Feb 6, 2026

Null pointer dereference in Oat++ 1.3.0 through 1.3.1 allows local users to crash an application by processing malformed JSON. The ObjectWrapper copy constructor copies an invalid oatpp::String and asks std::shared_ptr to increment a null control-block reference count. A low-privileged local user must be able to supply the malformed JSON to a consuming program; the demonstrated consequence is a process abort, not data access or modification.

CVSS severity3.3
Low
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Oat++ 1.3.0 through 1.3.1 allows local users to crash an application by processing malformed JSON. The ObjectWrapper copy constructor copies an invalid oatpp::String and asks std::shared_ptr to increment a null control-block reference count. A low-privileged local user must be able to supply the malformed JSON to a consuming program; the demonstrated consequence is a process abort, not data access or modification.

The record

CVE
CVE-2026-1990
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
Oat++
Product
Oat++
Classifications
CWE-476, CWE-404, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.0
  2. Affected versionversion=1.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Oat++ · Oat++version=1.3.0; version=1.3.1

Published CVSS scores

1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P
3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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