# CVE-2026-48758: nodejs24: sigstore-js provides JavaScript libraries for interacting with Sigstore services

CVE-2026-48758 is fixed in 10 products on 1 platform, first by ALAS2023-2026-1920, released July 6, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-48758
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 6, 2026

## Description

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature and breaking the type-binding guarantee that DSSE is designed to provide. This issue is fixed in version 3.2.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | nodejs24 amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-debuginfo amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-debugsource amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-devel amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-docs amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-full-i18n amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-libs amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-libs-debuginfo amzn 2023 | 1:24.18.0-1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | nodejs24-npm amzn 2023 | 1:11.16.0-1.24.18.0.1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |
| Linux | v8-13.6-devel amzn 2023 | 3:13.6.233.17-1.24.18.0.1.amzn2023.0.1 | [ALAS2023-2026-1920](https://patchblox.com/security/data/fix/linux/alas2023-2026-1920.md) | Jul 6, 2026 |

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Data as of 2026-11-11T07:45:43Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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