CVE-2026-20660 [High] | Path Traversal in Safari

A path handling issue was addressed with improved logic. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. A remote user may be able to write arbitrary files.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-21	0.06%	0.02%	-0.04%
2	2026-02-14	0.05%	0.06%	+0.01%
3	2026-02-13	—	0.05%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-21

0.06%

0.02%

-0.04%

2026-02-14

0.05%

0.06%

+0.01%

2026-02-13

—

0.05%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	3.9	3.6	[email protected]
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	1.8	3.6	134c704f-9b21-4f2e-91b3-4a467353bcc0

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

3.9

3.6

[email protected]

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

1.8

3.6

134c704f-9b21-4f2e-91b3-4a467353bcc0

Affected software / configurations for CVE-2026-20660

Vendor	Product	Version	Raw CPE
apple	safari	< 26.3	cpe:2.3:a:apple:safari::::::::
apple	ipados	< 18.7.5	cpe:2.3:o:apple:ipados::::::::
apple	ipados	>= 26.0, < 26.3	cpe:2.3:o:apple:ipados::::::::
apple	iphone_os	< 18.7.5	cpe:2.3:o:apple:iphone_os::::::::
apple	iphone_os	>= 26.0, < 26.3	cpe:2.3:o:apple:iphone_os::::::::
apple	macos	< 14.8.4	cpe:2.3:o:apple:macos::::::::
apple	macos	>= 26.0, < 26.3	cpe:2.3:o:apple:macos::::::::
apple	visionos	< 26.3	cpe:2.3:o:apple:visionos::::::::

References for CVE-2026-20660

URL	Tags
https://support.apple.com/en-us/126346	Release Notes Vendor Advisory
https://support.apple.com/en-us/126347	Release Notes Vendor Advisory
https://support.apple.com/en-us/126348	Release Notes Vendor Advisory
https://support.apple.com/en-us/126350	Release Notes Vendor Advisory
https://support.apple.com/en-us/126353	Release Notes Vendor Advisory
https://support.apple.com/en-us/126354	Release Notes Vendor Advisory
https://support.apple.com/en-us/126795

URL

CVE-2026-20660

Exploit prediction scoring system (EPSS) score for CVE-2026-20660

Common vulnerability scoring system (CVSS) metrics for CVE-2026-20660

Weakness enumeration for CVE-2026-20660

Affected software / configurations for CVE-2026-20660

References for CVE-2026-20660