CVE-2001-0778: OmniHTTPd 2.0.8 and earlier allow remote attackers to obtain source code via a GET request with the URL-encode

Q: How do I fix CVE-2001-0778?

omnihttpd: upgrade to newer than 2.0.8. Exact commands for each OS are on this page.

Q: Is CVE-2001-0778 being exploited?

CVE-2001-0778 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-2001-0778 affect?

CVE-2001-0778 affects omnihttpd. Severity is medium (CVSS 5.0). OmniHTTPd 2.0.8 and earlier allow remote attackers to obtain source code via a GET request with the URL-encoded symbol for a space (%20).

Q: How urgent is CVE-2001-0778?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

This month

MEDIUM 5.0UPGRADE

CVE-2001-0778 is a medium-severity flaw (CVSS 5.0) affecting omnihttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OmniHTTPd 2.0.8 and earlier allow remote attackers to obtain source code via a GET request with the URL-encoded symbol for a space (%20).

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	6.3% (top 6%)
CISA exploited list	No
Published	2001-10-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: omnicron

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

Am I affected?

Timeline

2001-10-18 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

omnicron omnihttpd UPGRADE

Affected: <= 2.0.8

Fixed in: newer than 2.0.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.0.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade omnihttpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade omnihttpd

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Omnicron OmniHTTPd 2.0.4-8 - File Source Disclosure

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-2001-0778?

omnihttpd: upgrade to newer than 2.0.8. Exact commands for each OS are on this page.

Is CVE-2001-0778 being exploited?

CVE-2001-0778 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-2001-0778 affect?

CVE-2001-0778 affects omnihttpd. Severity is medium (CVSS 5.0). OmniHTTPd 2.0.8 and earlier allow remote attackers to obtain source code via a GET request with the URL-encoded symbol for a space (%20).

How urgent is CVE-2001-0778?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2002-1455 MEDIUM 4.3 MITIGATE Multiple cross-site scripting (XSS) vulnerabilities in OmniHTTPd allow remote attackers to insert script or HT
CVE-2002-1035 MEDIUM 5.0 DOWNGRADE Omnicron OmniHTTPd 2.09 allows remote attackers to cause a denial of service (crash) via an HTTP request with
CVE-2001-0777 MEDIUM 5.0 DOWNGRADE Omnicron OmniHTTPd 2.0.8 allows remote attackers to cause a denial of service (memory exhaustion) via a series
CVE-2001-0613 MEDIUM 5.0 UPGRADE Omnicron Technologies OmniHTTPD Professional 2.08 and earlier allows a remote attacker to create a denial of s
CVE-2001-0114 MEDIUM 5.0 DOWNGRADE statsconfig.pl in OmniHTTPd 2.07 allows remote attackers to overwrite arbitrary files via the cgidir parameter

References

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