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Advisory record · GHSA-p2pf-g8cq-3gq5

teler-waf contains detection rule bypass via Entities payload

CVSS 6.5 MediumEPSS 0.0052 · 44th percentile

Published by the GitHub Advisory Database at 1 Mar 2023, 20:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/kitabisa/teler-wafGo<0.2.00.2.0
Identifiers
GHSA-p2pf-g8cq-3gq5 · CVE-2023-26047 · GO-2023-1600
Weakness (CWE)
CWE-79 · CWE-80 · CWE-692
Tags
Published
1 Mar 2023
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

teler-waf versions before 0.2.0 can be bypassed by a case-sensitive hex entities payload containing special characters such as CR/LF and horizontal tab, which evades the WAF's common web attack detection rules. An attacker can use this to launch cross-site scripting attacks that run arbitrary JavaScript in victims' browsers and steal data such as login credentials and session tokens. Upgrade to teler-waf version 0.2.0 or later.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0052, the 44th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:43 UTC First seen by agentprime
  2. 31 Oct 2026, 14:43 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.