CVE-2026-24825Network attack vector

Remote service crash via malformed JSON memory leak

Published Jan 27, 2026 · Updated Jan 27, 2026

Memory leak in YDB 24.4.4.2 and earlier allows remote attackers to crash database servers by submitting malformed JSON. The contrib/libs/yajl yajl_tree_parse path retains a parse context, map value, and string allocated while processing invalid nested JSON. Network access to a server path that invokes the bundled parser is sufficient, and repeated parse failures exhaust memory until the YDB process terminates.

CVSS severity6.9
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in YDB 24.4.4.2 and earlier allows remote attackers to crash database servers by submitting malformed JSON. The contrib/libs/yajl yajl_tree_parse path retains a parse context, map value, and string allocated while processing invalid nested JSON. Network access to a server path that invokes the bundled parser is sufficient, and repeated parse failures exhaust memory until the YDB process terminates.

The record

CVE
CVE-2026-24825
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
YDB
Product
YDB
Classifications
CWE-401, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 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=0 <=24.4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

YDB · YDBversion=0 <=24.4.4.2

Published CVSS scores

6.9Government Technology Agency of Singapore Cyber Security GroupCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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