Mozilla Firefox 1.5, Netscape 8.0.4 and 7.2, and K-Meleon before 0.9.12 allows remote attackers to cause a denial of service (CPU consumption and delayed application startup) via a web site with a large title, which is recorded in history.dat but not processed efficiently during startup. NOTE: despite initial reports, the Mozilla vendor does not believe that this issue can be used to trigger a crash or buffer overflow in Firefox. Also, it has been independently reported that Netscape 8.1 does not have this issue.
Conclusion & alert: CVE-2005-4134 is rated High Exploit Risk (67/100): CVSS Medium severity, with high exploitation likelihood (EPSS 27.69%, 96th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 26762 | exploit_db | edb | 2005-12-08 | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-02 | 29.39% | 27.69% | -1.69% |
| 2 | 2025-08-13 | 27.69% | 29.39% | +1.69% |
| 3 | 2025-03-30 | — | 27.69% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2005-4134 unimportant priority: Debian including 1 source packages (firefox), 1 status rows across 1 suites (sid): resolved 1. | https://security-tracker.debian.org/tracker/CVE-2005-4134 |
gentoo
|
normal | CVE-2005-4134: 2 GLSA(s) (200604-12, 200604-18), 4 atom(s) (www-client/mozilla, www-client/mozilla-bin, www-client/mozilla-firefox, www-client/mozilla-firefox-bin); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2005-4134 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2005-4134 |
ubuntu
|
medium | CVE-2005-4134 medium priority: Ubuntu including 4 source packages (firefox, firefox-granparadiso, lightning-sunbird, midbrowser), 16 status rows across 4 suites (dapper, edgy, feisty, upstream): DNE 9, needs-triage 4, released 3. | https://ubuntu.com/security/CVE-2005-4134 |
: This issue was fixed in K-Meleon version 0.9.12.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| k-meleon_project | k-meleon | <= 0.9 | cpe:2.3:a:k-meleon_project:k-meleon:*:*:*:*:*:*:*:* |
| k-meleon_project | k-meleon | 0.7 | cpe:2.3:a:k-meleon_project:k-meleon:0.7:*:*:*:*:*:*:* |
| k-meleon_project | k-meleon | 0.7_service_pack_1 | cpe:2.3:a:k-meleon_project:k-meleon:0.7_service_pack_1:*:*:*:*:*:*:* |
| k-meleon_project | k-meleon | 0.8 | cpe:2.3:a:k-meleon_project:k-meleon:0.8:*:*:*:*:*:*:* |
| k-meleon_project | k-meleon | 0.8.1 | cpe:2.3:a:k-meleon_project:k-meleon:0.8.1:*:*:*:*:*:*:* |
| k-meleon_project | k-meleon | 0.8.2 | cpe:2.3:a:k-meleon_project:k-meleon:0.8.2:*:*:*:*:*:*:* |
| mozilla | firefox | <= 1.5 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | mozilla_suite | <= 1.7.12 | cpe:2.3:a:mozilla:mozilla_suite:*:*:*:*:*:*:*:* |
| netscape | navigator | <= 8.0.40 | cpe:2.3:a:netscape:navigator:*:*:*:*:*:*:*:* |
| netscape | navigator | 7.1 | cpe:2.3:a:netscape:navigator:7.1:*:*:*:*:*:*:* |
| netscape | navigator | 7.2 | cpe:2.3:a:netscape:navigator:7.2:*:*:*:*:*:*:* |