# ALAS2023-2026-1886: runfinch-finch security update

ALAS2023-2026-1886, released June 22, 2026, fixes 7 CVEs in runfinch-finch (version 1.17.1-1.amzn2023.0.3). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/alas2023-2026-1886
- Platform: Linux
- Released: Jun 22, 2026
- Priority: Urgent (Closes CVE-2026-39821, rated Critical)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2026-1886.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [runfinch-finch](https://patchblox.com/security/data/product/linux/runfinch-finch.md) | amzn 2023 | 1.17.1-1.amzn2023.0.3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-39821](https://patchblox.com/security/data/cve/CVE-2026-39821.md) | Urgent | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna | 10.0 | 0.0183 |  |
| [CVE-2026-42504](https://patchblox.com/security/data/cve/CVE-2026-42504.md) | High | Quadratic complexity in WordDecoder.DecodeHeader in mime | 8.8 | 0.0056 |  |
| [CVE-2026-25681](https://patchblox.com/security/data/cve/CVE-2026-25681.md) | High | Invoking  incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html | 8.7 | 0.0022 |  |
| [CVE-2026-27136](https://patchblox.com/security/data/cve/CVE-2026-27136.md) | High | Invoking  duplicate attributes can cause XSS in golang.org/x/net/html | 8.7 | 0.0022 |  |
| [CVE-2026-42502](https://patchblox.com/security/data/cve/CVE-2026-42502.md) | High | Invoking  incorrect handling of HTML elements in foreign content in golang.org/x/net/html | 8.2 | 0.0022 |  |
| [CVE-2026-25680](https://patchblox.com/security/data/cve/CVE-2026-25680.md) | Routine | Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html | 6.5 | 0.0033 |  |
| [CVE-2026-42506](https://patchblox.com/security/data/cve/CVE-2026-42506.md) | Routine | Invoking  incorrect handling of namespaced elements in foreign content in golang.org/x/net/html | 6.1 | 0.0024 |  |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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