# HTTP/2 HPACK integer overflow and buffer allocation Advisory record · `GHSA-wgh7-54f2-x98r` - **Identifiers:** `GHSA-wgh7-54f2-x98r` · `BIT-jenkins-2023-36478` · `CVE-2023-36478` - **State:** Confirmed - **Severity:** CVSS 7.5 High - **Critical:** No - **Weakness (CWE):** [CWE-190](https://cwe.mitre.org/data/definitions/190.html) · [CWE-400](https://cwe.mitre.org/data/definitions/400.html) - **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) · [Denial of service](https://agentprime.io/advisories/tag/dos.md) - **Published:** 10 Oct 2023 - **Updated:** 10 Sept 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 10 Oct 2023, 21:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `org.eclipse.jetty.http2:http2-hpack` (Maven): affected `>=10.0.0, <10.0.16 || >=11.0.0, <11.0.16 || >=9.3.0, <9.4.53`; fixed in `10.0.16`, `11.0.16`, `9.4.53` - `org.eclipse.jetty.http3:http3-qpack` (Maven): affected `>=10.0.0, <10.0.16 || >=11.0.0, <11.0.16`; fixed in `10.0.16`, `11.0.16` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Versions of the org.eclipse.jetty.http2:http2-hpack package from 9.3.0 up to 9.4.53, from 10.0.0 up to 10.0.16, and from 11.0.0 up to 11.0.16 are affected, along with org.eclipse.jetty.http3:http3-qpack from 10.0.0 up to 10.0.16 and from 11.0.0 up to 11.0.16. A remote attacker can send crafted HTTP/2 headers with oversized or negative Huffman-coded lengths, causing a very large buffer allocation and possible out-of-memory denial of service. Upgrade to http2-hpack 9.4.53, 10.0.16 or 11.0.16, and http3-qpack 10.0.16 or 11.0.16. No workaround is listed. Written 2 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 - 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (GitHub_M) - **CISA KEV:** Not listed. - **EPSS:** 0.048, the 92nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 10 Oct 2023, 11:41 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/jetty/jetty.project/security/advisories/GHSA-wgh7-54f2-x98r) - 31 Oct 2026, 14:18 UTC: First seen by agentprime - 31 Oct 2026, 14:18 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-wgh7-54f2-x98r) ## Sources - [GitHub Advisory Database: GHSA-wgh7-54f2-x98r](https://github.com/advisories/GHSA-wgh7-54f2-x98r) - [OSV: GHSA-wgh7-54f2-x98r](https://osv.dev/vulnerability/GHSA-wgh7-54f2-x98r) - - - - - - - - - - - - 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: .