What is CVE-2026-34715?

CVE-2026-34715 is a medium-severity vulnerability in Vshakitskiy Ewe, classified under HTTP Response Splitting. CVSS score: 5.3/10. Published 2026-04-02.

How severe is CVE-2026-34715?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Vshakitskiy Ewe

CVE-2026-34715

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) sequence…

EPSS: 0.000 (4.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Vshakitskiy Ewe — versions < 3.0.6

Weakness classification (CWE)

CWE-113 — HTTP Response Splitting

References

https://github.com/vshakitskiy/ewe/security/advisories/GHSA-x2w3-23jr-hrpf (x_refsource_CONFIRM)
https://github.com/vshakitskiy/ewe/commit/ce4ff214d32626a10fda9398dc94a2d720e17446 (x_refsource_MISC)
https://github.com/vshakitskiy/ewe/releases/tag/v3.0.6 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34715?: CVE-2026-34715 is a medium-severity vulnerability in Vshakitskiy Ewe, classified under HTTP Response Splitting. CVSS score: 5.3/10. Published 2026-04-02.
How severe is CVE-2026-34715?: Medium severity. CVSS v3 base score is 5.3 out of 10.