CVE-2010-4410: CRLF injection vulnerability in the header function in (1) CGI.pm before 3.50 and (2) Simple.pm in CGI::Simple

Q: How do I fix CVE-2010-4410?

cgi.pm: upgrade to newer than 3.49; cgi-simple: upgrade to newer than 1.112. Exact commands for each OS are on this page.

Q: Is CVE-2010-4410 being exploited?

CVE-2010-4410 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-2010-4410 affect?

CVE-2010-4410 affects cgi.pm, cgi-simple. Severity is medium (CVSS 4.3). CRLF injection vulnerability in the header function in (1) CGI.pm before 3.50 and (2) Simple.pm in CGI::Simple 1.112 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via vector

Q: How urgent is CVE-2010-4410?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADEUPGRADE

CVE-2010-4410 is a medium-severity flaw (CVSS 4.3) affecting cgi.pm, cgi-simple. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CRLF injection vulnerability in the header function in (1) CGI.pm before 3.50 and (2) Simple.pm in CGI::Simple 1.112 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via vectors related to non-whitespace characters preceded by newline characters, a different vulnerability than CVE-2010-2761 and CVE-2010-3172.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-94
Published	2010-12-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: andy armstrong

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

Am I affected?

Timeline

2010-12-06 20:13 UTCPublished CVE record published
2026-06-16 23:24 UTCUpdated Record last modified

andy armstrong cgi.pm UPGRADE

Affected: <= 3.49 · 1.4 · 1.42 · 1.43 · 1.44 · 1.45 · 1.50 · 1.51

Fixed in: newer than 3.49

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cgi.pm || rpm -q cgi.pm || cgi.pm --version

2. UPGRADE to newer than 3.49 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cgi.pm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cgi.pm

Note

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

andy armstrong cgi-simple UPGRADE

Affected: <= 1.112 · 0.078 · 0.079 · 0.080 · 0.081 · 0.082 · 0.83 · 1.0

Fixed in: newer than 1.112

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cgi-simple || rpm -q cgi-simple || cgi-simple --version

2. UPGRADE to newer than 1.112 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cgi-simple

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cgi-simple

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-2010-4410?

cgi.pm: upgrade to newer than 3.49; cgi-simple: upgrade to newer than 1.112. Exact commands for each OS are on this page.

Is CVE-2010-4410 being exploited?

CVE-2010-4410 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-2010-4410 affect?

CVE-2010-4410 affects cgi.pm, cgi-simple. Severity is medium (CVSS 4.3). CRLF injection vulnerability in the header function in (1) CGI.pm before 3.50 and (2) Simple.pm in CGI::Simple 1.112 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via vector

How urgent is CVE-2010-4410?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2012-5526 MEDIUM 5.0 UPGRADE CGI.pm module before 3.63 for Perl does not properly escape newlines in (1) Set-Cookie or (2) P3P headers, whi
CVE-2010-4411 MEDIUM 4.3 UPGRADE Unspecified vulnerability in CGI.pm 3.50 and earlier allows remote attackers to inject arbitrary HTTP headers
CVE-2010-2761 MEDIUM 4.3 UPGRADE UPGRADE The multipart_init function in (1) CGI.pm before 3.50 and (2) Simple.pm in CGI::Simple 1.112 and earlier uses
CVE-2003-0615 MEDIUM 4.3 DOWNGRADE DOWNGRADE Cross-site scripting (XSS) vulnerability in start_form() of CGI.pm allows remote attackers to insert web scrip

References

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