CVE-2007-0838: FreeProxy before 3.92 Build 1626 allows malicious users to cause a denial of service (infinite loop) via a HOS

Routine

MEDIUM 5.0DOWNGRADE

CVE-2007-0838 is a medium-severity flaw (CVSS 5.0) affecting freeproxy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FreeProxy before 3.92 Build 1626 allows malicious users to cause a denial of service (infinite loop) via a HOST: header with a hostname and port number that refers to the server itself.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Published	2007-02-08
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: freeproxy

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-02-08 00:28 UTCPublished CVE record published
2026-06-16 22:36 UTCUpdated Record last modified

freeproxy freeproxy DOWNGRADE

Affected: 3.92

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.92

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.92 (Debian / Ubuntu)

apt-cache madison freeproxy sudo apt install freeproxy=<VERSION_BEFORE_3.92> sudo apt-mark hold freeproxy

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

dnf --showduplicates list freeproxy sudo dnf downgrade freeproxy-<VERSION_BEFORE_3.92> sudo dnf versionlock add freeproxy

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.

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-2007-0838?

freeproxy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-0838 being exploited?

CVE-2007-0838 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-2007-0838 affect?

CVE-2007-0838 affects freeproxy. Severity is medium (CVSS 5.0). FreeProxy before 3.92 Build 1626 allows malicious users to cause a denial of service (infinite loop) via a HOST: header with a hostname and port number that refers to the server itself.

How urgent is CVE-2007-0838?

Priority 39/100. No elevated risk signals yet.

References

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