ModerateVulnerabilityGHSA-xj5x-m3f3-5x3hCVE-2026-34778Published 3 Apr 2026

Electron: Service worker can spoof executeJavaScript IPC replies

Affected releases · electron

40.x40.0.0 – 40.8.0Fixed in 40.8.1
39.x39.0.0 – 39.8.0Fixed in 39.8.1
38.x38.0.0 – 38.8.4Fixed in 38.8.6
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36.x and older0.1.0 – 36.9.5No fix, no longer updated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 40.x, the newest line:

npm install electron@40.8.1

45.x

Not affected
45.0.0
1 release, latest

40.x

Affected
40.0.0 – 40.8.0
11 releases
Fixed
40.8.1 – 40.10.6
15 releases

39.x

Affected
39.0.0 – 39.8.0
21 releases
Fixed
39.8.1 – 39.8.10
10 releases

38.x

Affected
38.0.0 – 38.8.4
18 releases
Fixed
38.8.6
1 release

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

A service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data.

Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions.

Workarounds

Do not trust the return value of webContents.executeJavaScript() for security decisions. Use dedicated, validated IPC channels for security-relevant communication with renderers.

Fixed Versions

41.0.0
40.8.1
39.8.1
38.8.6

For more information

If there are any questions or comments about this advisory, please email security@electronjs.org