ModerateVulnerabilityGHSA-p2rr-rvmm-c5fpCVE-2026-70612Published 5 Aug 2026

Electron: Sandboxed iframes can launch external protocol handlers

Affected releases · electron

41.x41.0.0 – 41.2.0Fixed in 41.2.1
40.x40.0.0 – 40.8.5Fixed in 40.9.1
39.x39.0.0 – 39.8.7Fixed in 39.8.8
38.x38.0.0 – 38.8.6No fix on this line yet
37.x37.0.0 – 37.10.3No fix on this line yet
36.x and older0.1.0 – 36.9.5No fix, no longer updated

On 41.x, the newest line:

npm install electron@41.2.1

45.x

Not affected
45.0.0
1 release, latest

41.x

Affected
41.0.0 – 41.2.0
8 releases
Fixed
41.2.1 – 41.10.7
24 releases

40.x

Affected
40.0.0 – 40.8.5
16 releases
Fixed
40.9.1 – 40.10.6
10 releases

39.x

Affected
39.0.0 – 39.8.7
28 releases
Fixed
39.8.8 – 39.8.10
3 releases

38.x

Affected
38.0.0 – 38.8.6
19 releases

37.x

Affected
37.0.0 – 37.10.3
24 releases

36.x

Affected
36.0.0 – 36.9.5
23 releases

35.x

Affected
35.0.0 – 35.7.5
22 releases

34.x

Affected
34.0.0 – 34.5.8
22 releases

33.x

Affected
33.0.0 – 33.4.11
21 releases

32.x

Affected
32.0.0 – 32.3.3
19 releases

31.x

Affected
31.0.0 – 31.7.7
19 releases

30.x

Affected
30.0.0 – 30.5.1
19 releases

29.x

Affected
29.0.0 – 29.4.6
20 releases

28.x

Affected
28.0.0 – 28.3.3
21 releases

27.x

Affected
27.0.0 – 27.3.11
25 releases

26.x

Affected
26.0.0 – 26.6.10
24 releases

25.x

Affected
25.0.0 – 25.9.8
26 releases

24.x

Affected
24.0.0 – 24.8.8
29 releases

23.x

Affected
23.0.0 – 23.3.13
25 releases

22.x

Affected
22.0.0 – 22.3.27
33 releases

21.x

Affected
21.0.0 – 21.4.4
18 releases

20.x

Affected
20.0.0 – 20.3.12
23 releases

19.x

Affected
19.0.0 – 19.1.9
28 releases

18.x

Affected
18.0.0 – 18.3.15
25 releases

17.x

Affected
17.0.0 – 17.4.11
20 releases

16.x

Affected
16.0.0 – 16.2.8
22 releases

15.x

Affected
15.0.0 – 15.5.7
24 releases

14.x

Affected
14.0.0 – 14.2.9
15 releases

13.x

Affected
13.0.0 – 13.6.9
29 releases

12.x

Affected
12.0.0 – 12.2.3
26 releases

11.x

Affected
11.0.0 – 11.5.0
27 releases

10.x

Affected
10.0.0 – 10.4.7
22 releases

9.x

Affected
9.0.0 – 9.4.4
22 releases

8.x

Affected
8.0.0 – 8.5.5
25 releases

7.x

Affected
7.0.0 – 7.3.3
26 releases

6.x

Affected
6.0.0 – 6.1.12
26 releases

5.x

Affected
5.0.0 – 5.0.13
14 releases

4.x

Affected
4.0.0 – 4.2.12
28 releases

3.x

Affected
3.0.0 – 3.1.13
31 releases

2.x

Affected
2.0.0 – 2.0.18
19 releases

1.x

Affected
1.3.1 – 1.8.8
79 releases

0.x

Affected
0.1.0 – 0.4.1
8 releases

Is your project affected?

Paste your package.json, or type the range you declare for electron. It is read in your browser and sent nowhere.

What happens

Impact

Requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame's sandbox state was also not made available to the app's permission handlers.

Apps are only affected if they render untrusted content in sandboxed iframes and grant the openExternal permission (granted by default when no setPermissionRequestHandler is installed). Apps whose permission handler denies openExternal for untrusted content are not affected.

Workarounds

Install a setPermissionRequestHandler that denies the openExternal permission for untrusted content.

Fixed Versions

42.0.0-beta.3
41.2.1
40.9.0
39.8.8

For more information

If you have any questions or comments about this advisory, email Electron at security@electronjs.org