CVE-2026-59980
2 advisories.
PyPI/hpack CVE-2026-59980: medium, EPSS 0.30%
hpack: Unbounded variable integer decoding can cause run-away computation on malformed input
Action: Upgrade hpack to 4.2.0 or later.
pip install hpack==4.2.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 4.2.0 | - |
Fixed versions
| 4.2.0 |
Sources
- osv: GHSA-8v8h-hg4w-mvq2
- https://github.com/python-hyper/hpack/security/advisories/GHSA-8v8h-hg4w-mvq2
- https://nvd.nist.gov/vuln/detail/CVE-2026-59980
- https://github.com/python-hyper/hpack/commit/8cfb02c547740e16dbfe7aba77bad84b297cec2c
- https://cs.opensource.google/go/x/net/+/master:http2/hpack/hpack.go;l=468;drc=8e2b117aee74f6b86c207a808b0255de45c0a18a
- https://docs.rs/http2/0.5.19/src/http2/hpack/decoder.rs.html#403
- https://github.com/python-hyper/hpack
- https://github.com/python-hyper/hpack/releases/tag/v4.2.0
CVE-2026-59980 · published · modified · JSON
PyPI/hpack CVE-2026-59980: unknown, EPSS 0.30%
hpack: Unbounded variable integer decoding can cause run-away computation on malformed input
Action: Upgrade hpack to 4.2.0 or later.
pip install hpack==4.2.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 4.2.0 | - |
Fixed versions
| 4.2.0 |
Sources
- osv: PYSEC-2026-4053
- https://github.com/python-hyper/hpack/security/advisories/GHSA-8v8h-hg4w-mvq2
- https://nvd.nist.gov/vuln/detail/CVE-2026-59980
- https://github.com/python-hyper/hpack/commit/8cfb02c547740e16dbfe7aba77bad84b297cec2c
- https://cs.opensource.google/go/x/net/+/master:http2/hpack/hpack.go;l=468;drc=8e2b117aee74f6b86c207a808b0255de45c0a18a
- https://docs.rs/http2/0.5.19/src/http2/hpack/decoder.rs.html#403
- https://github.com/python-hyper/hpack
- https://github.com/python-hyper/hpack/releases/tag/v4.2.0
- https://pypi.org/project/hpack
- https://github.com/advisories/GHSA-8v8h-hg4w-mvq2
CVE-2026-59980 · published · modified · JSON