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High ALAS2023-2026-1749 16 CVEs

Important: golang-github-cpuguy83-md2man security update (Amazon Linux 2023)

Published May 25, 2026 · Updated May 26, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-42499: Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322. CVE-2026-39826: If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block. CVE-2026-39825: ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function. CVE-2026-39823: CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS. CVE-2026-39820: Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations. CVE-2026-33814: When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0. CVE-2026-33811: When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash. CVE-2026-32289: Context was not properly tracked across template branches for JS template literals, leading to possibly incorrect escaping of content. This could cause actions within JS template literals to be incorrectly escaped, leading to XSS vulnerabilities. CVE-2026-32282: On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. CVE-2026-32280: During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls. CVE-2026-27142: Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow "url=" by setting htmlmetacontenturlescape=0. CVE-2026-27139: On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was opened. The impact of this escape is limited to reading metadata provided by lstat from arbitrary locations on the filesystem without permitting reading or writing files outside the root. CVE-2025-61730: crypto/tls: handshake messages may be processed at the incorrect encryption level CVE-2025-61729: Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption. CVE-2025-61728: archive/zip: denial of service when parsing arbitrary ZIP archives CVE-2025-61726: net/http: memory exhaustion in Request.ParseForm

Fixed packages 5

ReleasePackageFixed in
Amazon Linux · 2023 compat-golang-github-cpuguy83-md2man-2-devel 0:2.0.2-24.amzn2023.0.7
Amazon Linux · 2023 golang-github-cpuguy83-md2man 0:2.0.2-24.amzn2023.0.7
Amazon Linux · 2023 golang-github-cpuguy83-md2man-debuginfo 0:2.0.2-24.amzn2023.0.7
Amazon Linux · 2023 golang-github-cpuguy83-md2man-debugsource 0:2.0.2-24.amzn2023.0.7
Amazon Linux · 2023 golang-github-cpuguy83-md2man-devel 0:2.0.2-24.amzn2023.0.7

Vulnerabilities 16

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-61726.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-61728.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-61729.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-61730.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-27139.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-27142.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-32280.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-32282.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-32289.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-33811.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-33814.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-39820.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-39823.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-39825.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-39826.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-42499.html