The framework is the supply chain now. next.js 16.3.6 and 15.5.26 ship september 22 as a critical…
the framework is the supply chain now. next.js 16.3.6 and 15.5.26 ship september 22 as a critical out-of-band security update for an upstream issue.
a dependency of your dependency just became your security incident.
Context
Next.js's security update post of September 22, 2026 describes an out-of-band update in v16.3.6 (Active LTS) and v15.5.26 (Maintenance LTS) that upgrades upstream dependencies including Satori. It cites advisory GHSA-vcvr-r3jv-pc5j, with the related upstream advisory GHSA-wx4j-mvgx-mqwp for Satori, for remote code execution in the Node.js ImageResponse implementation in next/og, rated Critical, affecting Next.js >=16.2.0 and <16.3.6. The Edge ImageResponse is not affected. The post says it arises under specific conditions from improper escaping in Satori SVG output.
Security details here are cited only. 15.5.26 is described as related hardening and the post says Next.js 15.x is not affected by the remote code execution issue, so the two versions should not both carry the critical label. The exact conditions were not stated in the text read, a CVE ID appears only in secondary snippets and is unverified, and no exploitation, exposure counts or user exposure are claimed. Supply chain is the author's framing, consistent with the post's upstream wording. The release time of day was not in the text, so the note's time cannot be checked.
Watch next
- The CVE record and the advisory's exploit conditions.
Sources
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 22 September 2026 at 07:19 IST. Sources are the papers and datasets the note draws on.
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