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Servers and applications

CVE-2021-39275

ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.

Severity
Critical 9.8
Published
16 Sept 2021
Last changed
17 Jun 2026
Added to UpHeron
17 Oct 2026
Fixed in
2.4.49
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • Every version before 2.4.49

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-39275
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-39275