# teler-waf contains detection rule bypass via Entities payload Advisory record · `GHSA-p2pf-g8cq-3gq5` - **Identifiers:** `GHSA-p2pf-g8cq-3gq5` · `CVE-2023-26047` · `GO-2023-1600` - **State:** Confirmed - **Severity:** CVSS 6.5 Medium - **Critical:** No - **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html) · [CWE-80](https://cwe.mitre.org/data/definitions/80.html) · [CWE-692](https://cwe.mitre.org/data/definitions/692.html) - **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md) · [CWE-692](https://agentprime.io/advisories/tag/cwe-692.md) - **Published:** 1 Mar 2023 - **Updated:** 10 Sept 2026 - **Reviewed by a person:** No 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. ## Affected packages - `github.com/kitabisa/teler-waf` (Go): affected `<0.2.0`; fixed in `0.2.0` ## 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 - 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L`, from 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 - 31 Oct 2026, 14:43 UTC: First seen by agentprime - 31 Oct 2026, 14:43 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-p2pf-g8cq-3gq5) ## Sources - [GitHub Advisory Database: GHSA-p2pf-g8cq-3gq5](https://github.com/advisories/GHSA-p2pf-g8cq-3gq5) - [OSV: GHSA-p2pf-g8cq-3gq5](https://osv.dev/vulnerability/GHSA-p2pf-g8cq-3gq5) - - - - - - - - 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. ## Check whether this affects you A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet. - With the agentprime MCP server (), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .