CVE-2016-5268
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT...
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
4.3
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
- Record
CVE-2016-5268- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-254
- Updated
- 2026-11-02
CVE List No score
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
- Record
CVE-2016-5268- Updated
- 2026-11-02
EUVDEUVD-2016-6219 No score
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
- Record
EUVD-2016-6219- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j5jj-f68h-7qh9
4.3
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT...
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
- Record
GHSA-j5jj-f68h-7qh9- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2016-5268
4.3
Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
- Record
UBUNTU-CVE-2016-5268- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score
MozillaFirefox-50.1.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10071-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score
firefox-esr-128.5.1-1.1 on GA media
These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14572-1- Updated
- 2026-11-02
OSVUSN-3044-1 No score
firefox vulnerabilities
Gustavo Grieco discovered an out-of-bounds read during XML parsing in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or obtain sensitive information. (CVE-2016-0718)
Toni Huttunen discovered that once a favicon is requested from a site, the remote server can keep the network connection open even after the page is closed. A remote attacked could potentially exploit this to track users, resulting in information disclosure. (CVE-2016-2830)
Christian Holler, Tyson Smith, Boris Zbarsky, Byron Campen, Julian Seward, Carsten Book, Gary Kwong, Jesse Ruderman, Andrew McCreight, and Phil Ringnalda discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-2835, CVE-2016-2836)
A buffer overflow was discovered in the ClearKey Content Decryption Module (CDM) during video playback. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via plugin process crash, or, in combination with another vulnerability to escape the GMP sandbox, execute arbitrary code. (CVE-2016-2837)
Atte Kettunen discovered a buffer overflow when rendering SVG content in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-2838)
Bert Massop discovered a crash in Cairo with version 0.10 of FFmpeg. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-2839)
Catalin Dumitru discovered that URLs of resources loaded after a navigation start could be leaked to the following page via the Resource Timing API. An attacker could potentially exploit this to obtain sensitive information. (CVE-2016-5250)
Firas Salem discovered an issue with non-ASCII and emoji characters in data: URLs. An attacker could potentially exploit this to spoof the addressbar contents. (CVE-2016-5251)
Georg Koppen discovered a stack buffer underflow during 2D graphics rendering in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5252)
Abhishek Arya discovered a use-after-free when the alt key is used with top-level menus. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5254)
Jukka Jylänki discovered a crash during garbage collection. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code. (CVE-2016-5255)
Looben Yang discovered a use-after-free in WebRTC. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5258)
Looben Yang discovered a use-after-free when working with nested sync events in service workers. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-5259)
Mike Kaply discovered that plain-text passwords can be stored in session restore if an input field type is changed from "password" to "text" during a session, leading to information disclosure. (CVE-2016-5260)
Samuel Groß discovered an integer overflow in WebSockets during data buffering in some…
- Record
USN-3044-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
firefoxUbuntu:14.04:LTS |
before 48.0+build2-0ubuntu0.14.04.1, plus listed versions 24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1 Show 37 moreShow less28.0+build2-0ubuntu229.0+build1-0ubuntu0.14.04.230.0+build1-0ubuntu0.14.04.331.0+build1-0ubuntu0.14.04.132.0+build1-0ubuntu0.14.04.132.0.3+build1-0ubuntu0.14.04.133.0+build2-0ubuntu0.14.04.134.0+build2-0ubuntu0.14.04.135.0+build3-0ubuntu0.14.04.235.0.1+build1-0ubuntu0.14.04.136.0+build2-0ubuntu0.14.04.436.0.1+build2-0ubuntu0.14.04.136.0.4+build1-0ubuntu0.14.04.137.0+build2-0ubuntu0.14.04.137.0.1+build1-0ubuntu0.14.04.137.0.2+build1-0ubuntu0.14.04.138.0+build3-0ubuntu0.14.04.139.0+build5-0ubuntu0.14.04.139.0.3+build2-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.440.0.3+build1-0ubuntu0.14.04.141.0+build3-0ubuntu0.14.04.141.0.1+build2-0ubuntu0.14.04.141.0.2+build2-0ubuntu0.14.04.142.0+build2-0ubuntu0.14.04.143.0+build1-0ubuntu0.14.04.143.0.4+build3-0ubuntu0.14.04.144.0+build3-0ubuntu0.14.04.144.0.1+build2-0ubuntu0.14.04.144.0.2+build1-0ubuntu0.14.04.145.0+build2-0ubuntu0.14.04.145.0.1+build1-0ubuntu0.14.04.245.0.2+build1-0ubuntu0.14.04.146.0+build5-0ubuntu0.14.04.246.0.1+build1-0ubuntu0.14.04.347.0+build3-0ubuntu0.14.04.1 |
48.0+build2-0ubuntu0.14.04.1 |
firefoxUbuntu:16.04:LTS |
before 48.0+build2-0ubuntu0.16.04.1, plus listed versions 41.0.2+build2-0ubuntu142.0+build2-0ubuntu144.0+build3-0ubuntu244.0.1+build1-0ubuntu144.0.2+build1-0ubuntu1 Show 6 moreShow less45.0+build2-0ubuntu145.0.1+build1-0ubuntu145.0.2+build1-0ubuntu146.0+build5-0ubuntu0.16.04.246.0.1+build1-0ubuntu0.16.04.247.0+build3-0ubuntu0.16.04.1 |
48.0+build2-0ubuntu0.16.04.1 |
firefoxUbuntu:14.04:LTS From an advisory covering 22 CVEs |
before 48.0+build2-0ubuntu0.14.04.1, plus listed versions 24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1 Show 37 moreShow less28.0+build2-0ubuntu229.0+build1-0ubuntu0.14.04.230.0+build1-0ubuntu0.14.04.331.0+build1-0ubuntu0.14.04.132.0+build1-0ubuntu0.14.04.132.0.3+build1-0ubuntu0.14.04.133.0+build2-0ubuntu0.14.04.134.0+build2-0ubuntu0.14.04.135.0+build3-0ubuntu0.14.04.235.0.1+build1-0ubuntu0.14.04.136.0+build2-0ubuntu0.14.04.436.0.1+build2-0ubuntu0.14.04.136.0.4+build1-0ubuntu0.14.04.137.0+build2-0ubuntu0.14.04.137.0.1+build1-0ubuntu0.14.04.137.0.2+build1-0ubuntu0.14.04.138.0+build3-0ubuntu0.14.04.139.0+build5-0ubuntu0.14.04.139.0.3+build2-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.440.0.3+build1-0ubuntu0.14.04.141.0+build3-0ubuntu0.14.04.141.0.1+build2-0ubuntu0.14.04.141.0.2+build2-0ubuntu0.14.04.142.0+build2-0ubuntu0.14.04.143.0+build1-0ubuntu0.14.04.143.0.4+build3-0ubuntu0.14.04.144.0+build3-0ubuntu0.14.04.144.0.1+build2-0ubuntu0.14.04.144.0.2+build1-0ubuntu0.14.04.145.0+build2-0ubuntu0.14.04.145.0.1+build1-0ubuntu0.14.04.245.0.2+build1-0ubuntu0.14.04.146.0+build5-0ubuntu0.14.04.246.0.1+build1-0ubuntu0.14.04.347.0+build3-0ubuntu0.14.04.1 |
48.0+build2-0ubuntu0.14.04.1 |
firefoxUbuntu:16.04:LTS From an advisory covering 22 CVEs |
before 48.0+build2-0ubuntu0.16.04.1, plus listed versions 41.0.2+build2-0ubuntu142.0+build2-0ubuntu144.0+build3-0ubuntu244.0.1+build1-0ubuntu144.0.2+build1-0ubuntu1 Show 6 moreShow less45.0+build2-0ubuntu145.0.1+build1-0ubuntu145.0.2+build1-0ubuntu146.0+build5-0ubuntu0.16.04.246.0.1+build1-0ubuntu0.16.04.247.0+build3-0ubuntu0.16.04.1 |
48.0+build2-0ubuntu0.16.04.1 |
MozillaFirefoxopenSUSE:Tumbleweed From an advisory covering 899 CVEs |
before 50.1.0-1.1 | 50.1.0-1.1 |
firefox-esropenSUSE:Tumbleweed From an advisory covering 1860 CVEs |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2016-5268 is a medium vulnerability (CVSS 4.3) in Mozilla Firefox, published August 3, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.23%, the 69th percentile. Fixed in firefox 48.0+build2-0ubuntu0.14.04.1.
References
securitytracker.com/id/1036508
bugzilla.mozilla.org/show_bug.cgi?id=1253673
ubuntu.com/usn/USN-3044-1
securityfocus.com/bid/92260
security.gentoo.org/glsa/201701-15
lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
Show 194 moreShow less
lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
mozilla.org/security/announce/2016/mfsa2016-83.html
nvd.nist.gov/vuln/detail/CVE-2016-5268
github.com/advisories/GHSA-j5jj-f68h-7qh9
ubuntu.com/security/CVE-2016-5268
mozilla.org/en-US/security/advisories/mfsa2016-83
ubuntu.com/security/notices/USN-3044-1
cve.org/CVERecord?id=CVE-2016-5268
ubuntu.com/security/CVE-2016-0718
ubuntu.com/security/CVE-2016-2830
ubuntu.com/security/CVE-2016-2835
ubuntu.com/security/CVE-2016-2836
ubuntu.com/security/CVE-2016-2837
ubuntu.com/security/CVE-2016-2838
ubuntu.com/security/CVE-2016-2839
ubuntu.com/security/CVE-2016-5250
ubuntu.com/security/CVE-2016-5251
ubuntu.com/security/CVE-2016-5252
ubuntu.com/security/CVE-2016-5254
ubuntu.com/security/CVE-2016-5255
ubuntu.com/security/CVE-2016-5258
ubuntu.com/security/CVE-2016-5259
ubuntu.com/security/CVE-2016-5260
ubuntu.com/security/CVE-2016-5261
ubuntu.com/security/CVE-2016-5262
ubuntu.com/security/CVE-2016-5263
ubuntu.com/security/CVE-2016-5264
ubuntu.com/security/CVE-2016-5265
ubuntu.com/security/CVE-2016-5266
suse.com/security/cve/CVE-2008-5913
suse.com/security/cve/CVE-2009-0040
suse.com/security/cve/CVE-2009-0652
suse.com/security/cve/CVE-2009-0771
suse.com/security/cve/CVE-2009-0772
suse.com/security/cve/CVE-2009-0773
suse.com/security/cve/CVE-2009-0774
suse.com/security/cve/CVE-2009-0775
suse.com/security/cve/CVE-2009-0776
suse.com/security/cve/CVE-2009-0777
suse.com/security/cve/CVE-2009-1044
suse.com/security/cve/CVE-2009-1169
suse.com/security/cve/CVE-2009-1302
suse.com/security/cve/CVE-2009-1303
suse.com/security/cve/CVE-2009-1304
suse.com/security/cve/CVE-2009-1305
suse.com/security/cve/CVE-2009-1306
suse.com/security/cve/CVE-2009-1307
suse.com/security/cve/CVE-2009-1308
suse.com/security/cve/CVE-2009-1309
suse.com/security/cve/CVE-2009-1310
suse.com/security/cve/CVE-2009-1311
suse.com/security/cve/CVE-2009-1312
suse.com/security/cve/CVE-2009-1313
suse.com/security/cve/CVE-2009-1563
suse.com/security/cve/CVE-2009-2470
suse.com/security/cve/CVE-2009-2654
suse.com/security/cve/CVE-2009-3069
suse.com/security/cve/CVE-2009-3070
suse.com/security/cve/CVE-2009-3071
suse.com/security/cve/CVE-2009-3072
suse.com/security/cve/CVE-2009-3073
suse.com/security/cve/CVE-2009-3074
suse.com/security/cve/CVE-2009-3075
suse.com/security/cve/CVE-2009-3077
suse.com/security/cve/CVE-2009-3078
suse.com/security/cve/CVE-2009-3079
suse.com/security/cve/CVE-2009-3274
suse.com/security/cve/CVE-2009-3370
suse.com/security/cve/CVE-2009-3371
suse.com/security/cve/CVE-2009-3372
suse.com/security/cve/CVE-2009-3373
suse.com/security/cve/CVE-2009-3374
suse.com/security/cve/CVE-2009-3375
suse.com/security/cve/CVE-2009-3376
suse.com/security/cve/CVE-2009-3377
suse.com/security/cve/CVE-2009-3378
suse.com/security/cve/CVE-2009-3379
suse.com/security/cve/CVE-2009-3380
suse.com/security/cve/CVE-2009-3381
suse.com/security/cve/CVE-2009-3383
suse.com/security/cve/CVE-2009-3388
suse.com/security/cve/CVE-2009-3389
suse.com/security/cve/CVE-2009-3555
suse.com/security/cve/CVE-2009-3979
suse.com/security/cve/CVE-2009-3980
suse.com/security/cve/CVE-2009-3982
suse.com/security/cve/CVE-2009-3983
suse.com/security/cve/CVE-2009-3984
suse.com/security/cve/CVE-2009-3985
suse.com/security/cve/CVE-2010-0164
suse.com/security/cve/CVE-2010-0165
suse.com/security/cve/CVE-2010-0166
suse.com/security/cve/CVE-2010-0167
suse.com/security/cve/CVE-2010-0168
suse.com/security/cve/CVE-2010-0169
suse.com/security/cve/CVE-2010-0170
suse.com/security/cve/CVE-2010-0171
suse.com/security/cve/CVE-2010-0172
suse.com/security/cve/CVE-2010-0173
suse.com/security/cve/CVE-2010-0174
suse.com/security/cve/CVE-2010-0176
suse.com/security/cve/CVE-2010-0177
suse.com/security/cve/CVE-2010-0178
suse.com/security/cve/CVE-2010-0181
suse.com/security/cve/CVE-2010-0182
suse.com/security/cve/CVE-2010-0654
suse.com/security/cve/CVE-2010-1028
suse.com/security/cve/CVE-2010-1121
suse.com/security/cve/CVE-2010-1125
suse.com/security/cve/CVE-2010-1196
suse.com/security/cve/CVE-2010-1197
suse.com/security/cve/CVE-2010-1198
suse.com/security/cve/CVE-2010-1199
suse.com/security/cve/CVE-2010-1200
suse.com/security/cve/CVE-2010-1201
suse.com/security/cve/CVE-2010-1202
suse.com/security/cve/CVE-2010-1203
suse.com/security/cve/CVE-2010-1205
suse.com/security/cve/CVE-2010-1206
suse.com/security/cve/CVE-2010-1207
suse.com/security/cve/CVE-2010-1208
suse.com/security/cve/CVE-2010-1209
suse.com/security/cve/CVE-2010-1210
suse.com/security/cve/CVE-2010-1211
suse.com/security/cve/CVE-2010-1212
suse.com/security/cve/CVE-2010-1213
suse.com/security/cve/CVE-2010-1214
suse.com/security/cve/CVE-2010-1215
suse.com/security/cve/CVE-2010-2751
suse.com/security/cve/CVE-2010-2752
suse.com/security/cve/CVE-2010-2753
suse.com/security/cve/CVE-2010-2754
suse.com/security/cve/CVE-2010-2755
suse.com/security/cve/CVE-2010-2760
suse.com/security/cve/CVE-2010-2762
suse.com/security/cve/CVE-2010-2764
suse.com/security/cve/CVE-2010-2765
suse.com/security/cve/CVE-2010-2766
suse.com/security/cve/CVE-2010-2767
suse.com/security/cve/CVE-2010-2768
suse.com/security/cve/CVE-2010-2769
suse.com/security/cve/CVE-2010-3166
suse.com/security/cve/CVE-2010-3167
suse.com/security/cve/CVE-2010-3168
suse.com/security/cve/CVE-2010-3169
suse.com/security/cve/CVE-2010-3170
suse.com/security/cve/CVE-2010-3173
suse.com/security/cve/CVE-2010-3174
suse.com/security/cve/CVE-2010-3175
suse.com/security/cve/CVE-2010-3176
suse.com/security/cve/CVE-2010-3177
suse.com/security/cve/CVE-2010-3178
suse.com/security/cve/CVE-2010-3179
suse.com/security/cve/CVE-2010-3180
suse.com/security/cve/CVE-2010-3182
suse.com/security/cve/CVE-2010-3183
suse.com/security/cve/CVE-2010-3765
suse.com/security/cve/CVE-2011-0068
suse.com/security/cve/CVE-2011-0069
suse.com/security/cve/CVE-2011-0070
suse.com/security/cve/CVE-2011-0079
suse.com/security/cve/CVE-2011-0080
suse.com/security/cve/CVE-2011-0081
suse.com/security/cve/CVE-2011-0084
suse.com/security/cve/CVE-2011-1187
suse.com/security/cve/CVE-2011-1202
suse.com/security/cve/CVE-2011-2366
suse.com/security/cve/CVE-2011-2367
suse.com/security/cve/CVE-2011-2368
suse.com/security/cve/CVE-2011-2369
suse.com/security/cve/CVE-2011-2370
suse.com/security/cve/CVE-2011-2371
suse.com/security/cve/CVE-2011-2372
suse.com/security/cve/CVE-2011-2373
suse.com/security/cve/CVE-2011-2374
suse.com/security/cve/CVE-2011-2375
suse.com/security/cve/CVE-2011-2377
suse.com/security/cve/CVE-2011-2985
suse.com/security/cve/CVE-2011-2986
suse.com/security/cve/CVE-2011-2988
suse.com/security/cve/CVE-2011-2989
suse.com/security/cve/CVE-2011-2990
suse.com/security/cve/CVE-2011-2991
suse.com/security/cve/CVE-2011-2992
suse.com/security/cve/CVE-2011-2993
suse.com/security/cve/CVE-2011-2995
suse.com/security/cve/CVE-2011-2996
suse.com/security/cve/CVE-2011-2997
suse.com/security/cve/CVE-2011-3000
suse.com/security/cve/CVE-2011-3001
suse.com/security/cve/CVE-2011-3002
suse.com/security/cve/CVE-2011-3003
suse.com/security/cve/CVE-2011-3004
lists.opensuse.org/archives/list/[email protected]/thread/3HI2RC7AJAHY74Q6MK7GNGWU6TITB22V
Left out here: 1,890 references and the rest of 1 source description. The JSON record has them.