# CVE-2026-45072: Symfony: Stored XSS in WebProfiler CodeExtension::fileExcerpt() — Unescaped Non-PHP File Rendering > Stored XSS in Symfony WebProfiler allows attackers to execute scripts in developer browsers via unescaped non-PHP file logs. - **Severity:** Low 2.0 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 14 Jul 2026 - **Updated:** 15 Jul 2026 - **Also known as:** DEBIAN-CVE-2026-45072, GHSA-hmr5-2xcr-v8pp, UBUNTU-CVE-2026-45072 ## What is CVE-2026-45072? CVE-2026-45072 is a low-severity cross-site scripting vulnerability in Sensiolabs Symfony, published on 14 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. ### Official description Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.4.24 until 6.4.40, 7.4.12, and 8.0.12, the development profiler file_excerpt Twig filter escapes PHP files through highlight_string() but interpolates lines from non-PHP files directly into elements, allowing stored XSS against a developer who opens an attacker-written file such as var/log/dev.log in the profiler. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12. Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation) ## Which versions are affected by CVE-2026-45072? 12 open source packages ship an affected version, including symfony/symfony, symfony/twig-bridge and symfony/web-profiler-bundle. It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `symfony/symfony` | Packagist | From 6.4.24 | 6.4.40 | | `symfony/symfony` | Packagist | From 6.4.24 | 6.4.40 | | `symfony/symfony` | Packagist | From 7.2.9 | 7.4.12 | | `symfony/symfony` | Packagist | From 7.2.9 | 7.4.12 | | `symfony/symfony` | Packagist | From 8.0.0 | 8.0.12 | | `symfony/symfony` | Packagist | From 8.0.0 | 8.0.12 | | `symfony/twig-bridge` | Packagist | From 6.4.24 | 6.4.40 | | `symfony/twig-bridge` | Packagist | From 6.4.24 | 6.4.40 | | `symfony/web-profiler-bundle` | Packagist | From 7.2.9 | 7.4.12 | | `symfony/web-profiler-bundle` | Packagist | From 7.2.9 | 7.4.12 | | `symfony/web-profiler-bundle` | Packagist | From 8.0.0 | 8.0.12 | | `symfony/web-profiler-bundle` | Packagist | From 8.0.0 | 8.0.12 | Products: Sensiolabs Symfony. ## How do I fix CVE-2026-45072? Upgrade symfony/symfony to a fixed version for your release line: 6.4.40, 7.4.12 or 8.0.12. ## Is CVE-2026-45072 being exploited? There is no known exploitation of CVE-2026-45072 in the wild and no public exploit code. ## Other vulnerabilities in Sensiolabs Symfony - [CVE-2019-11325](https://insights.sbomify.com/CVE-2019-11325/): Improper Input Validation in Symfony (critical 9.8) - [CVE-2017-11365](https://insights.sbomify.com/CVE-2017-11365/): Symfony Incorrect Access Control (critical 9.8) - [CVE-2019-10913](https://insights.sbomify.com/CVE-2019-10913/): Invalid HTTP method overrides allow possible XSS or other attacks in Symfony (critical 9.8) - [CVE-2018-11407](https://insights.sbomify.com/CVE-2018-11407/): Symfony Authentication Bypass (critical 9.8) - [CVE-2016-2403](https://insights.sbomify.com/CVE-2016-2403/): Symfony Authentication Bypass (critical 9.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-45072 and fix it if it is affected. What it is: CVE-2026-45072 is a low-severity cross-site scripting vulnerability in Sensiolabs Symfony, published on 14 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2026-45072 in the wild and no public exploit code. Affected packages and fixed versions: - symfony/symfony (Packagist): affected from 6.4.24; fixed in 6.4.40 - symfony/symfony (Packagist): affected from 6.4.24; fixed in 6.4.40 - symfony/symfony (Packagist): affected from 7.2.9; fixed in 7.4.12 - symfony/symfony (Packagist): affected from 7.2.9; fixed in 7.4.12 - symfony/symfony (Packagist): affected from 8.0.0; fixed in 8.0.12 - symfony/symfony (Packagist): affected from 8.0.0; fixed in 8.0.12 - symfony/twig-bridge (Packagist): affected from 6.4.24; fixed in 6.4.40 - symfony/twig-bridge (Packagist): affected from 6.4.24; fixed in 6.4.40 - symfony/web-profiler-bundle (Packagist): affected from 7.2.9; fixed in 7.4.12 - symfony/web-profiler-bundle (Packagist): affected from 7.2.9; fixed in 7.4.12 - symfony/web-profiler-bundle (Packagist): affected from 8.0.0; fixed in 8.0.12 - symfony/web-profiler-bundle (Packagist): affected from 8.0.0; fixed in 8.0.12 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-45072/ (Markdown: https://insights.sbomify.com/CVE-2026-45072/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45072 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45072 - OSV: https://osv.dev/vulnerability/CVE-2026-45072 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-45072/ Summaries are generated and may contain mistakes; the official description above is the record.