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CVE-2006-2786
HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows…
- 2.6LowCVSS base score
- 1.8%Exploitation in 30 daysEPSS · top 22% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.
Timeline
ID reserved
By mitre
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Low2.6 | AV:N/AC:H/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 1.8% · top 22% of all CVEs (10 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.6.
Affected products
n/a
- affected n/a
References
47
- 20709 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21176 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- MDKSA-2006:145 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- ADV-2006-3748 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- USN-296-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- mozilla-http-response-smuggling(26844) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- USN-323-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 20561 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- oval:org.mitre.oval:def:9966 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- RHSA-2006:0594 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 21336 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20382 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 1016214 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 20060602 rPSA-2006-0091-1 firefox thunderbird (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- ADV-2006-3749 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- RHSA-2006:0610 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 20376 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- RHSA-2006:0609 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 21178 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 1016202 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 18228 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 21532 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21270 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2008-0083 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 21188 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21134 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21631 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SSRT061181 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- SSRT061236 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- USN-296-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- GLSA-200606-21 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- DSA-1118 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- DSA-1120 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2006:0611 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- DSA-1134 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- GLSA-200606-12 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 21324 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21183 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 22066 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21269 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SUSE-SA:2006:035 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://www.mozilla.org/security/announce/2006/mfsa2006-33.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-297-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2006:0578 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- ADV-2006-2106 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- MDKSA-2006:143 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 22065 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-2783 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2006-2786)Record last updated .