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Fencer Intel
critical 9.3

CVE-2010-2766 json

The normalizeDocument function in Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, an…

published 16y ago modified 4mo ago also EUVD-2010-2770

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.4%
EPSS 5.4% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The normalizeDocument function in Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, and SeaMonkey before 2.0.7 does not properly handle the removal of DOM nodes during normalization, which might allow remote attackers to execute arbitrary code via vectors involving access to a deleted object.

Patch / fix

  • firefox RHEL 4 3.6.9-1.el4
  • firefox RHEL 5 3.6.9-2.el5
  • nss RHEL 4 3.12.7-1.el4
  • nss RHEL 5 3.12.7-2.el5
  • nspr RHEL 4 4.8.6-1.el4
  • nspr RHEL 5 4.8.6-1.el5
  • nss-tools RHEL 4 3.12.7-1.el4
  • nss-tools RHEL 5 3.12.7-2.el5

red hat advisories RHSA-2010:0681

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

Is CVE-2010-2766 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-2766 updated cvss 6.8

Mozilla Crash and remote code execution in normalizeDocument (MFSA 2010-57)

  • Red Hat Enterprise Linux (v. 5 server) nspr 4.8.6-1.el5, nss 3.12.7-2.el5, firefox 3.6.9-2.el5, nss-tools 3.12.7-2.el5, xulrunner 1.9.2.9-1.el5 Red Hat Enterprise Linux AS version 4 nspr 4.8.6-1.el4, nss 3.12.7-1.el4, firefox 3.6.9-1.el4, nss-tools 3.12.7-1.el4 Red Hat Enterprise Linux Desktop (v. 5 client) nspr 4.8.6-1.el5, nss 3.12.7-2.el5, firefox 3.6.9-2.el5, nss-tools 3.12.7-2.el5, xulrunner 1.9.2.9-1.el5 Red Hat Enterprise Linux Desktop version 4 nspr 4.8.6-1.el4, nss 3.12.7-1.el4, firefox 3.6.9-1.el4, nss-tools 3.12.7-1.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) nspr 4.8.6-1.el5, nss 3.12.7-2.el5, xulrunner 1.9.2.9-1.el5 Red Hat Enterprise Linux ES version 4 nspr 4.8.6-1.el4, nss 3.12.7-1.el4, firefox 3.6.9-1.el4, nss-tools 3.12.7-1.el4
    +1 more products
    Red Hat Enterprise Linux WS version 4 nspr 4.8.6-1.el4, nss 3.12.7-1.el4, firefox 3.6.9-1.el4, nss-tools 3.12.7-1.el4
    fixed: vendor fix RHSA-2010:0681
  • Red Hat Enterprise Linux 6 firefox
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

5.37% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.