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CVE-2006-2786

12
FAUCET Score

CVE-2006-2786 describes an HTTP response smuggling vulnerability affecting Mozilla Firefox and Thunderbird versions prior to 1.5.0.4, particularly when used with specific proxy servers. This flaw allows remote attackers to manipulate how the browser interprets server responses, potentially causing it to treat a single response as originating from two different sites. The vulnerability has a low CVSS score of 2.6, indicating a network attack vector with high attack complexity and a potential impact limited to partial integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.5.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
<= 1.5.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.6LOW

AV:N/AC:H/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.77%
Probability of exploitation in next 30 days
EPSS Percentile
75.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0177 is in the 65th percentile among its peer group of 1,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

redhatpatch availablevia redhat_api
Product: Red Hat Linux Advanced Workstation 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.2-0.1.0.EL3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.10-0.2.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.3-0.el4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.5.0.5-0.el4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.5-0.el4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux AS (Advanced Server) version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux ES version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux WS version 2.1
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2006-2786Moderate

security flaw

Jun 1, 2006

References

rhn.redhat.com / errata/RHSA-2006-0609.html
secunia.com / advisories/20376
secunia.com / advisories/20382
secunia.com / advisories/20561
secunia.com / advisories/20709
secunia.com / advisories/21134
secunia.com / advisories/21176
secunia.com / advisories/21178
secunia.com / advisories/21183
secunia.com / advisories/21188
secunia.com / advisories/21269
secunia.com / advisories/21270
secunia.com / advisories/21324
secunia.com / advisories/21336
secunia.com / advisories/21532
secunia.com / advisories/21631
secunia.com / advisories/22065
secunia.com / advisories/22066
securitytracker.com / id
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/26844
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9966
usn.ubuntu.com / 296-1
usn.ubuntu.com / 296-2
usn.ubuntu.com / 297-1
usn.ubuntu.com / 323-1
debian.org / security/2006/dsa-1118
debian.org / security/2006/dsa-1120
debian.org / security/2006/dsa-1134
gentoo.org / security/en/glsa/glsa-200606-12.xml
gentoo.org / security/en/glsa/glsa-200606-21.xml
mandriva.com / security/advisories
mandriva.com / security/advisories
mozilla.org / security/announce/2006/mfsa2006-33.html
Vendor Advisory
novell.com / linux/security/advisories/2006_35_mozilla.html
redhat.com / support/errata/RHSA-2006-0578.html
redhat.com / support/errata/RHSA-2006-0594.html
redhat.com / support/errata/RHSA-2006-0610.html
redhat.com / support/errata/RHSA-2006-0611.html
securityfocus.com / archive/1/435795/100/0/threaded
securityfocus.com / archive/1/446657/100/200/threaded
securityfocus.com / archive/1/446658/100/200/threaded
securityfocus.com / bid/18228
vupen.com / english/advisories/2006/2106
vupen.com / english/advisories/2006/3748
vupen.com / english/advisories/2006/3749
vupen.com / english/advisories/2008/0083