CVE-2019-1010239: DaveGamble/cJSON cJSON 1.7.8 is affected by: Improper Check for Unusual or Exceptional Conditions

Q: How do I fix CVE-2019-1010239?

cjson: downgrade or apply the listed mitigation; timesten in-memory database: upgrade to 18.1.3.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2019-1010239 being exploited?

CVE-2019-1010239 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-1010239 affect?

CVE-2019-1010239 affects cjson, timesten in-memory database. Severity is high (CVSS 7.5). DaveGamble/cJSON cJSON 1.7.8 is affected by: Improper Check for Unusual or Exceptional Conditions. The impact is: Null dereference, so attack can cause denial of service. The component is: cJSON_GetObjectItemCaseSensitive() function. The at

Q: How urgent is CVE-2019-1010239?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEDOWNGRADEUPGRADE

CVE-2019-1010239 is a high-severity flaw (CVSS 7.5) affecting cjson, timesten in-memory database. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DaveGamble/cJSON cJSON 1.7.8 is affected by: Improper Check for Unusual or Exceptional Conditions. The impact is: Null dereference, so attack can cause denial of service. The component is: cJSON_GetObjectItemCaseSensitive() function. The attack vector is: crafted json file. The fixed version is: 1.7.9 and later.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-476, CWE-754
Published	2019-07-19
Last modified	2026-06-17

Publisher (CNA): DWF · Vendor: davegamble · oracle

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-07-19 17:15 UTCPublished CVE record published
2026-06-17 02:09 UTCUpdated Record last modified

davegamble cjson DOWNGRADE

Affected: 1.7.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.8

1. Check installed version

apt-cache policy cjson || rpm -q cjson || cjson --version

2. No fixed release: DOWNGRADE to a release before 1.7.8 (Debian / Ubuntu)

apt-cache madison cjson sudo apt install cjson=<VERSION_BEFORE_1.7.8> sudo apt-mark hold cjson

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cjson sudo dnf downgrade cjson-<VERSION_BEFORE_1.7.8> sudo dnf versionlock add cjson

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

oracle timesten in-memory database UPGRADE

Affected: < 18.1.3.1.0

Fixed in: 18.1.3.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy timesten-in-memory-database || rpm -q timesten-in-memory-database || timesten-in-memory-database --version

2. UPGRADE to 18.1.3.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade timesten-in-memory-database

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade timesten-in-memory-database

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-1010239?

cjson: downgrade or apply the listed mitigation; timesten in-memory database: upgrade to 18.1.3.1.0. Exact commands for each OS are on this page.

Is CVE-2019-1010239 being exploited?

CVE-2019-1010239 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-1010239 affect?

CVE-2019-1010239 affects cjson, timesten in-memory database. Severity is high (CVSS 7.5). DaveGamble/cJSON cJSON 1.7.8 is affected by: Improper Check for Unusual or Exceptional Conditions. The impact is: Null dereference, so attack can cause denial of service. The component is: cJSON_GetObjectItemCaseSensitive() function. The at

How urgent is CVE-2019-1010239?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-16554 HIGH 7.8 DOWNGRADE cJSON library is vulnerable to an integer overflow in the print_string_ptr() function in cJSON.c on 32-bit pla
CVE-2026-67215 HIGH 7.5 UPGRADE cJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC
CVE-2026-67216 MEDIUM 5.9 UPGRADE cJSON through 1.7.19 contains an inefficient algorithmic complexity flaw in cJSON_Compare()
CVE-2026-67217 MEDIUM 5.3 UPGRADE cJSON through 1.7.19 applies RFC 6902 JSON Patch operations non-atomically in apply_patch() in cJSON_Utils.c
CVE-2025-57052 CRITICAL 9.8 UPGRADE cJSON 1.5.0 through 1.7.18 allows out-of-bounds access via the decode_array_index_from_pointer function in cJS

References

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