# ALAS2023-2026-1747: amazon-cloudwatch-agent security update

ALAS2023-2026-1747, released May 25, 2026, fixes 19 CVEs in amazon-cloudwatch-agent (version 1.300066.2-2.amzn2023). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/alas2023-2026-1747
- Platform: Linux
- Released: May 25, 2026
- Priority: Urgent (Closes CVE-2026-27143, rated Critical)
- CVEs: 19, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2026-1747.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [amazon-cloudwatch-agent](https://patchblox.com/security/data/product/linux/amazon-cloudwatch-agent.md) | amzn 2023 | 1.300066.2-2.amzn2023 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-27143](https://patchblox.com/security/data/cve/CVE-2026-27143.md) | Urgent | Missing bound checks can lead to memory corruption in safe Go in cmd/compile | 9.8 | 0.0055 |  |
| [CVE-2026-41602](https://patchblox.com/security/data/cve/CVE-2026-41602.md) | High | thrift: Integer Overflow or Wraparound vulnerability in Apache Thrift TFramedTransport Go language implementation  This issue... | 7.5 | 0.0116 |  |
| [CVE-2026-33811](https://patchblox.com/security/data/cve/CVE-2026-33811.md) | High | Crash when handling long CNAME response in net | 8.8 | 0.0088 |  |
| [CVE-2026-33814](https://patchblox.com/security/data/cve/CVE-2026-33814.md) | High | Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net | 7.5 | 0.0084 |  |
| [CVE-2026-42154](https://patchblox.com/security/data/cve/CVE-2026-42154.md) | High | Prometheus: remote read endpoint allows denial of service via crafted snappy payload | 8.2 | 0.0081 |  |
| [CVE-2026-42499](https://patchblox.com/security/data/cve/CVE-2026-42499.md) | High | Quadratic string concatenation in consumePhrase in net/mail | 8.8 | 0.0080 |  |
| [CVE-2026-39820](https://patchblox.com/security/data/cve/CVE-2026-39820.md) | High | Quadratic string concatentation in consumeComment in net/mail | 8.8 | 0.0078 |  |
| [CVE-2026-32283](https://patchblox.com/security/data/cve/CVE-2026-32283.md) | High | Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls | 9.1 | 0.0063 |  |
| [CVE-2026-32280](https://patchblox.com/security/data/cve/CVE-2026-32280.md) | High | Unexpected work during chain building in crypto/x509 | 9.1 | 0.0063 |  |
| [CVE-2026-32287](https://patchblox.com/security/data/cve/CVE-2026-32287.md) | High | golang-github-antchfx-xpath: Boolean XPath expressions that evaluate to true can cause an infinite loop in logicalQuery.Select, leading to 100% CP... | 7.5 | 0.0054 |  |
| [CVE-2026-39825](https://patchblox.com/security/data/cve/CVE-2026-39825.md) | High | ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil | 7.5 | 0.0039 |  |
| [CVE-2026-39826](https://patchblox.com/security/data/cve/CVE-2026-39826.md) | High | Escaper bypass leads to XSS in html/template | 7.5 | 0.0037 |  |
| [CVE-2026-32281](https://patchblox.com/security/data/cve/CVE-2026-32281.md) | High | Inefficient policy validation in crypto/x509 | 9.1 | 0.0036 |  |
| [CVE-2026-39823](https://patchblox.com/security/data/cve/CVE-2026-39823.md) | High | Bypass of meta content URL escaping causes XSS in html/template | 7.5 | 0.0031 |  |
| [CVE-2026-32282](https://patchblox.com/security/data/cve/CVE-2026-32282.md) | High | TOCTOU permits root escape on Linux via Root.Chmod in os in internal/syscall/unix | 9.1 | 0.0030 |  |
| [CVE-2026-27144](https://patchblox.com/security/data/cve/CVE-2026-27144.md) | High | Miscompilation allows memory corruption via CONVNOP-wrapped array copy in cmd/compile | 9.0 | 0.0027 |  |
| [CVE-2026-32289](https://patchblox.com/security/data/cve/CVE-2026-32289.md) | Routine | JsBraceDepth Context Tracking Bugs (XSS) in html/template | 6.1 | 0.0030 |  |
| [CVE-2026-32288](https://patchblox.com/security/data/cve/CVE-2026-32288.md) | Routine | Unbounded allocation for old GNU sparse in archive/tar | 5.5 | 0.0030 |  |
| [CVE-2026-39882](https://patchblox.com/security/data/cve/CVE-2026-39882.md) | Routine | OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies | 5.3 | 0.0020 |  |

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Data as of 2026-11-10T13:56:55Z 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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