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Go and Rust both get portable SIMD, a build log that took over accounts, and Claude Opus 5.5 at $20 per million

Two languages shipped the same idea this week: write vector code once and let the toolchain fit it to each CPU. The security stories had a theme too. A CI log, a peer-to-peer protocol and a WordPress template function all turned out to trust more than they should.

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  1. Go 1.27 simd package brings portable, emulated SIMD

    The Go team explained its experimental portable `simd` package. One code path runs on AVX-512, NEON, wasm and RISC-V, and the compiler specializes it per vector width. There is no `ReduceSum` until Go 1.28.

  2. Fearless SIMD 1.0 brings stable, safe SIMD to Rust

    Released September 21, it covers SSE2 to AVX-512, NEON and WebAssembly behind a stable API, with three years of security fixes promised. Rust's answer is a library; Go's is the compiler.

  3. SourceHut build log XSS let attackers take over accounts

    A crafted OSC 8 escape sequence in a CI log ran script in the viewer's browser, exposing CSRF tokens and deploy keys. ansi2html 1.9.4 fixes CVE-2026-92973. Check your lockfiles for 1.7.0 to 1.9.3.

  4. Radicle 1.10.3 and earlier send private repos in cleartext

    Every release so far sends repository data unencrypted and lets attackers pose as trusted peers. No fix ships yet; Radicle 2.0 will change the network.

  5. WordPress 7.1.2 fixes get_page_template() RCE flaw

    CVE-2026-87902 is a remote code execution bug that reaches back to WordPress 4.7. The project's advice is short: update now.

  6. Claude Opus 5.5 cuts output price to $20 per million

    Anthropic's new model costs $4 input and $20 output per million tokens, with thinking always switched on. Rerun your cost estimates before you rerun your evals.

  7. Git 2.56 adds history drop and delete-merged

    Over 700 non-merge commits, due at the end of September, with new commands for dropping commits and pruning merged branches.

  8. Linux 7.4 patch opens files 39% faster in tests

    A 43-line change drops two redundant dentry references on every file open. On a 20-core benchmark that was worth 39%.

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