CVE-2016-4583: WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to bypass

Q: How do I fix CVE-2016-4583?

webkit: mitigate or apply the listed mitigation; webkitgtk\+: upgrade to 2.12.2. Exact commands for each OS are on this page.

Q: Is CVE-2016-4583 being exploited?

CVE-2016-4583 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-4583 affect?

CVE-2016-4583 affects webkit, webkitgtk\+. Severity is low (CVSS 3.1). WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to bypass the Same Origin Policy and obtain image date from an unintended web site via a timing attack involving an SVG document.

Q: How urgent is CVE-2016-4583?

Priority 31/100. No elevated risk signals yet.

Routine

LOW 3.1MITIGATEUPGRADE

CVE-2016-4583 is a low-severity flaw (CVSS 3.1) affecting webkit, webkitgtk\+. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to bypass the Same Origin Policy and obtain image date from an unintended web site via a timing attack involving an SVG document.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-362
Published	2016-07-22
Last modified	2026-06-17

Publisher (CNA): Apple Inc. · Vendor: apple · webkitgtk

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2016-07-22 02:59 UTCPublished CVE record published
2026-06-17 00:47 UTCUpdated Record last modified

apple webkit MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy webkit || rpm -q webkit || webkit --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

webkitgtk webkitgtk\+ UPGRADE

Affected: < 2.12.2

Fixed in: 2.12.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy webkitgtk+ || rpm -q webkitgtk+ || webkitgtk+ --version

2. UPGRADE to 2.12.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade webkitgtk+

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade webkitgtk+

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2016-4583?

webkit: mitigate or apply the listed mitigation; webkitgtk\+: upgrade to 2.12.2. Exact commands for each OS are on this page.

Is CVE-2016-4583 being exploited?

CVE-2016-4583 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2016-4583 affect?

CVE-2016-4583 affects webkit, webkitgtk\+. Severity is low (CVSS 3.1). WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to bypass the Same Origin Policy and obtain image date from an unintended web site via a timing attack involving an SVG document.

How urgent is CVE-2016-4583?

Priority 31/100. No elevated risk signals yet.

Software pages

iOS vulnerabilities · Safari vulnerabilities · WebKit vulnerabilities · Apple Safari and WebKit vulnerabilities · tvOS vulnerabilities

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References

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