Can't copy/past images since iOS 26

A couple of comments: 1) nobody is “shilling “ for Apple, and it doesn’t forward your cause to insult someone trying to help you; 2) the files you are working with may not be “corrupted”, but the file name, or rather extension, certainly is, and this is directly why you can’t use it.

I attempted, with assistance from some friends, to replicate your issue, and cannot. So this is obviously not an iOS26 issue per se.

The one thing I can recommend are the following: restart the device, or force restart it https://support.apple.com/guide/iphone/force-restart-iphone-iph8903c3ee6/ios

you could also consider clearing browser cache.

There are circumstances where web page images can be protected from copying, but based on the limited information you have provided, I would think that unlikely in this case.

Provide a link to the website in question. I’m happy to check if it’s potentially your device or the site.

Copy/Paste feature issues are not always the fault of the iOS update!  Many things can cause phone problems.  If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.

Remember, the right question often leads to the solution!

Was/Is your device Jailbroken? If that's the situation, please be informed that attributing the issues to iOS updates may not be accurate.

iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.

Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.

See what each update does: OS — iOS 26, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

The file name ends with a six‑digit number followed by the .png extension. However, the thumbnail preview only displays the six‑digit number, without showing any file type indicator such as .pdf, .xlsx, .png, or other attributes. This mismatch suggests that the file may be corrupted or incompatible with iOS media formats.

I’ve had a similar issue. When trying to copy an image sent over text that’s in that large iCloud grouping, I cannot paste it in iMessage. I will click copy and then when I go to type, it will not give me the option to paste. I’ve even tried typing some, but the option won’t appear.