PatchTheCVECVE-2023-34609: An issue was discovered flexjson thru 3.3 allows attackers to cause a denial of service or other unspecified i
CVE-2023-34609 is a high-severity flaw (CVSS 7.5) affecting flexjson. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered flexjson thru 3.3 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
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 | 1.2% (top 33%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2023-06-14 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2023-34609?
flexjson: upgrade to newer than 3.3. Exact commands for each OS are on this page.
Is CVE-2023-34609 being exploited?
CVE-2023-34609 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-2023-34609 affect?
CVE-2023-34609 affects flexjson. Severity is high (CVSS 7.5). An issue was discovered flexjson thru 3.3 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
How urgent is CVE-2023-34609?
Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action