CVE-2026-34715ewe is a Gleam web server.
Updated under an hour ago ()
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It affects vshakitskiy ewe. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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ewe is a Gleam web server. Prior to version 3.0.6, the encode_headers function in src/ewe/internal/encoder.gleam directly interpolates response header keys and values into raw HTTP bytes without validating or stripping CRLF (\r\n) sequences. An application that passes user-controlled data into response headers (e.g., setting a Location redirect header from a request parameter) allows an attacker to inject arbitrary HTTP response content, leading to response splitting, cache poisoning, and possible cross-site scripting. Notably, ewe does validate CRLF in incoming request headers via validate_field_value() in the HTTP/1.1 parser — but provides no equivalent protection for outgoing response headers in the encoder. This issue has been patched in version 3.0.6.
- CVSS
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-113
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vshakitskiy ewe vshakitskiy:ewe | before 3.0.6 | NVD |
References
- https://github.com/vshakitskiy/ewe/commit/ce4ff214d32626a10fda9398dc94a2d720e17446patch
- https://github.com/vshakitskiy/ewe/releases/tag/v3.0.6product, release-notes
- https://github.com/vshakitskiy/ewe/security/advisories/GHSA-x2w3-23jr-hrpfexploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.