Apple Releases iOS 26.5: RCS End-to-End Encryption, 50+ Security Fixes, and Pride Wallpapers — Everything You Need to Know
Apple released iOS 26.5 on May 11, 2026, and within hours it became a breakout search trend on Google with over 10,000 searches — a 300% spike driven by one feature in particular: RCS end-to-end encryption is finally here.
But that’s not all. iOS 26.5 also patches over 50 security vulnerabilities, adds 11 new Pride wallpapers, and lays groundwork for app sideloading in Brazil.
Here’s everything you need to know before hitting that update button.
What Is iOS 26.5?
iOS 26.5 is a point release in Apple’s iOS 26 cycle — not a major version like the Liquid Glass redesign that arrived with 26.0 last September. It follows iOS 26.4 (released in March 2026) and will likely be the final significant update before WWDC 2026, where Apple is expected to unveil iOS 27.
Key details:
- Version: iOS 26.5 (build number 23F79)
- Release date: May 11, 2026
- Type: Public release (not beta)
- Size: Approximately 1.2–1.8 GB depending on device
- Compatible devices: All iPhones that support iOS 26 (iPhone 11 and later)
The 3 Headline Features
1. RCS End-to-End Encryption
This is the feature that broke the search charts. iOS 26.5 adds end-to-end encrypted RCS messaging in the Messages app — meaning texts between iPhone and Android users are now fully encrypted when both carriers support the standard.
Why this matters:
- Before iOS 26.5, RCS messages between iPhone and Android used transport-layer encryption (TLS) but weren’t end-to-end encrypted — meaning Apple or Google could technically access message content in transit
- With E2EE, no third party — not Apple, not Google, not the carrier — can read your cross-platform messages
- This closes the last major security gap between iMessage (blue bubbles) and RCS (green bubbles)
Which carriers support it at launch: The feature is rolling out gradually by carrier. As of launch day, major US carriers (Verizon, T-Mobile, AT&T) have confirmed support, with international carriers expected to follow in waves.
How to tell if it’s working: In an RCS conversation with an Android user, you’ll see a lock icon with a checkmark next to messages when E2EE is active.
2. 50+ Security Vulnerability Fixes
Apple’s security release notes for iOS 26.5 list fixes for 53 separate CVEs (Common Vulnerabilities and Exposures), spanning:
| Category | Count |
|---|---|
| Kernel | 8 |
| WebKit (Safari engine) | 12 |
| Apple Neural Engine | 3 |
| Core Media | 5 |
| IOMobileFrameBuffer | 2 |
| Sandbox | 2 |
| libxml2, libxpc, ImageIO | 8 |
| Other system services | 13 |
Notable among these: a kernel vulnerability (CVE-2026-39142) that could allow a malicious app to execute arbitrary code with kernel privileges, and a WebKit flaw (CVE-2026-39158) that could lead to arbitrary code execution when visiting a crafted web page. Both were reportedly exploited in the wild before being patched.
Bottom line: If you haven’t updated yet, do it. At least two of these vulnerabilities were actively exploited before Apple released the fix.
3. New Pride Wallpapers
As part of Apple’s annual Pride Collection, iOS 26.5 introduces 11 colorful wallpapers plus a custom Pride wallpaper builder that lets you mix and match colors, patterns, and styles. There’s also a matching Apple Watch face in watchOS 26.5 and a new Pride Edition Sport Loop band.
The wallpapers range from subtle gradient designs to bold geometric patterns that interact with the Lock Screen’s always-on display.
Other Notable Changes
Reminders App Improvements
iOS 26.5 enhances the Reminders app’s Apple Intelligence-powered suggestions, making it better at surfacing tasks based on your email, messages, and calendar. The app can now suggest follow-up reminders when you’ve been asked to do something in a conversation.
App Sideloading Support for Brazil
Following a ruling from Brazil’s competition regulator, iOS 26.5 sets up the infrastructure for app sideloading (installing apps from sources other than the App Store) for Brazilian users. This feature is region-locked and won’t affect users outside Brazil.
Bug Fixes and Performance
Early adopters on Reddit and the MacRumors forums report:
- Improved battery life on iPhone 15 Pro and iPhone 16 models, with some users noting 5–8% longer screen-on time
- Fix for the persistent keyboard lag that appeared in iOS 26.4 on some iPhone 14 Pro models
- CarPlay stability improvements, particularly the wireless CarPlay disconnect bug
- A fix for the Photos app crashing when editing Spatial Scene wallpapers
iOS 26.5 Compatibility: Which iPhones Can Upgrade?
All iPhones that support iOS 26 can install iOS 26.5:
| iPhone Model | Year | Notes |
|---|---|---|
| iPhone 17 Pro / 17 / 17e | 2025–2026 | Full support |
| iPhone 16 Pro / 16 / 16e | 2024–2025 | Full support |
| iPhone 15 Pro / 15 | 2023–2024 | Full support, adaptive power features |
| iPhone 14 Pro / 14 | 2022–2023 | Full support |
| iPhone 13 / 13 mini | 2021–2022 | Full support |
| iPhone 12 / 12 mini | 2020–2021 | Full support |
| iPhone 11 / 11 Pro | 2019–2020 | Full support |
| iPhone SE (3rd gen) | 2022 | Full support |
| iPhone SE (2nd gen) | 2020 | Full support |
Apple Intelligence features (Live Translation, Visual Intelligence, Genmoji, Writing Tools) require iPhone 15 Pro or newer.
Should You Upgrade to iOS 26.5?
Upgrade immediately if:
- You message Android users regularly (RCS E2EE is a genuine security upgrade)
- You’re security-conscious (53 CVEs patched, at least 2 exploited in the wild)
- You’re on iOS 26.4 and experiencing keyboard lag or CarPlay issues
You can wait if:
- You’re on a critical device where app compatibility is essential (wait 2–3 days for app developers to confirm compatibility)
- You’re jailbroken (do not update — you’ll lose the jailbreak)
Don’t upgrade if:
- You rely on enterprise apps that haven’t been certified for iOS 26.5 (check with your IT department first)
How to Update
- Back up your iPhone — either to iCloud or to your computer via Finder/iTunes
- Open Settings > General > Software Update
- Tap Download and Install
- Enter your passcode, agree to the terms, and wait
Pro tip: If the OTA update is slow (common on launch day), connect to your computer and update via Finder (macOS) or Apple Devices app (Windows) — it’s typically faster and more reliable.
What If You Want to Downgrade?
Apple typically stops signing the previous version (iOS 26.4) within 3–7 days of a new release. If you experience critical issues:
- Download the iOS 26.4 IPSW file from ipsw.me
- Connect your iPhone to your computer
- In Finder (macOS) or Apple Devices (Windows), Option-click (Mac) or Shift-click (Windows) the “Restore iPhone” button
- Select the iOS 26.4 IPSW file
Important: This wipes your device. You cannot “downgrade” without a full restore.
What’s Next: iOS 27 at WWDC 2026
iOS 26.5 is likely the final feature update before Apple’s Worldwide Developers Conference in June 2026, where iOS 27 will be unveiled. Rumors suggest iOS 27 will focus on:
- Expanded Apple Intelligence capabilities across more apps
- Deeper integration between iPhone and Vision Pro
- A redesigned Control Center built on the Liquid Glass design language
- Enhanced multi-tasking for the rumored iPhone Fold
Until then, iOS 26.5 is the version to be on — especially for the RCS encryption alone.
FAQs
Q: Will RCS E2EE work with all Android phones?
A: It requires both your iPhone and the Android device to be on carrier-supported RCS with E2EE. Google Messages on Android supports it; Samsung Messages may need an update.
Q: Does iOS 26.5 slow down older iPhones?
A: Early reports suggest no — the update is primarily security fixes and feature additions, with no significant performance changes on iPhone 11–13.
Q: Can I remove the Pride wallpapers if I don’t want them?
A: They’re not installed by default — they appear as options in the wallpaper picker. You have to actively choose them to use them.
Q: How do I know if my RCS messages are encrypted?
A: Look for the lock icon with a checkmark next to messages in an RCS conversation with an Android user. If it’s missing, your carrier may not yet support E2EE.
Q: What’s the build number for iOS 26.5?
A: 23F79.