{"id":"CVE-2026-44219","aliases":["EUVD-2026-29796","GHSA-xw8c-rrvx-f7xq","PYSEC-2026-2410"],"status":"published","title":"ciguard: SCA HTTP client reads response body without size cap","description":"ciguard is a static security auditor for CI/CD pipelines. From 0.6.0 to 0.8.1, both SCA HTTP clients (src/ciguard/analyzer/sca/osv.py and src/ciguard/analyzer/sca/endoflife.py) call payload = json.loads(resp.read().decode('utf-8')) without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory. This vulnerability is fixed in 0.8.2.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00301,"percentile":0.23199,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-05-05T22:17:43Z","modified":"2026-10-28T02:31:04Z","fixes":[{"ecosystem":"PyPI","package":"ciguard","fixed_in":["0.8.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"ciguard","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.6.0"},{"last_affected":"0.8.1"},{"fixed":"0.8.2"}]}]},{"source":"osv","ecosystem":"PyPI","package":"ciguard","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.6.0"},{"fixed":"0.8.2"}]}],"versions":["0.6.0","0.6.1","0.7.0","0.8.1"]},{"source":"osv","ecosystem":"PyPI","package":"ciguard","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.6.0"},{"fixed":"0.8.2"}]}],"versions":["0.6.0","0.6.1","0.7.0","0.8.1"]}],"products":[{"vendor":"jo-jo98","product":"ciguard"}],"references":[{"url":"https://github.com/Jo-Jo98/ciguard/security/advisories/GHSA-xw8c-rrvx-f7xq","tags":["x_refsource_CONFIRM","exploit","advisory","web"]},{"url":"https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2","tags":["web"]},{"url":"https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44219","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-xw8c-rrvx-f7xq","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44219.json","tags":["advisory"]},{"url":"https://github.com/Jo-Jo98/ciguard","tags":["package"]},{"url":"https://pypi.org/project/ciguard","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-44219","title":"ciguard: SCA HTTP client reads response body without size cap","description":"ciguard is a static security auditor for CI/CD pipelines. From 0.6.0 to 0.8.1, both SCA HTTP clients (src/ciguard/analyzer/sca/osv.py and src/ciguard/analyzer/sca/endoflife.py) call payload = json.loads(resp.read().decode('utf-8')) without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory. This vulnerability is fixed in 0.8.2.","status":"published","published":"2026-05-12T19:40:28.848Z","modified":"2026-05-13T14:20:04.224Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:43:00.288193Z"}],"euvd":[{"id":"EUVD-2026-29796","description":"ciguard is a static security auditor for CI/CD pipelines. From 0.6.0 to 0.8.1, both SCA HTTP clients (src/ciguard/analyzer/sca/osv.py and src/ciguard/analyzer/sca/endoflife.py) call payload = json.loads(resp.read().decode('utf-8')) without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory. This vulnerability is fixed in 0.8.2.","status":"published","published":"2026-05-12T19:40:28Z","modified":"2026-05-13T14:20:04Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T19:04:34.274348Z"}],"ghsa":[{"id":"GHSA-xw8c-rrvx-f7xq","title":"ciguard: SCA HTTP client reads response body without size cap","description":"## Summary\n\nBoth SCA HTTP clients (`src/ciguard/analyzer/sca/osv.py` and `src/ciguard/analyzer/sca/endoflife.py`) call `payload = json.loads(resp.read().decode('utf-8'))` without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory.\n\n## Threat scenario\n\nciguard process memory exhaustion → OOM kill or system swap thrash. Realistic when ciguard runs in CI with a limited memory budget (typical: 4-8 GB). No data integrity or confidentiality impact.\n\n**Realism caveat:** both URLs are hardcoded HTTPS, so this is a low-realism threat (HTTPS prevents MITM unless the attacker controls a trusted CA or hijacks DNS in a way that doesn't trigger cert validation). The unbounded read is structural defence-in-depth, not a directly exploitable bug today.\n\n## Patch\n\n- New `MAX_RESPONSE_BYTES = 5 * 1024 * 1024` (5 MB) constant in both modules.\n- `body = resp.read(MAX_RESPONSE_BYTES + 1)` with overflow check returns `None` (caller falls back to stale cache).\n- 3 regression tests in `tests/test_sca_rules.py::TestSCAResponseSizeCap`.\n\n## Discovery\n\nFound during ciguard's first self-conducted pentest cycle, 2026-04-26.\n\n## CVSS Scoring\n\n- CVSS v3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L` — 3.7 (Low)\n- CVSS v4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N` — first.org calc 3.1 (Low); GitHub's calc 6.3 (Medium). Vector is correct — choosing v3.1 as the structured score keeps the consistent Low rating across consumers.\n\n## Reproduction\n\nMonkey-patch `urllib.request.urlopen` to return a fake 50 MB response; observe memory growth before/after the call. Pre-fix: process memory grows by ~50 MB. Post-fix: `_fetch` returns `None`, memory growth bounded to MAX_RESPONSE_BYTES.\n\n## References\n\n- Fix released in [v0.8.2](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2)\n- CI regression gate added in [v0.8.3](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3)\n- https://www.cve.org/CVERecord?id=CVE-2026-44219","status":"published","published":"2026-05-05T22:17:43Z","modified":"2026-05-15T23:50:39Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:40:11.298154Z"}],"nvd":[{"id":"CVE-2026-44219","description":"ciguard is a static security auditor for CI/CD pipelines. From 0.6.0 to 0.8.1, both SCA HTTP clients (src/ciguard/analyzer/sca/osv.py and src/ciguard/analyzer/sca/endoflife.py) call payload = json.loads(resp.read().decode('utf-8')) without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory. This vulnerability is fixed in 0.8.2.","status":"published","published":"2026-05-12T20:16:42.767Z","modified":"2026-10-26T18:10:00.173Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:18.613259Z"}],"osv":[{"id":"CVE-2026-44219","title":"ciguard: SCA HTTP client reads response body without size cap","description":"ciguard is a static security auditor for CI/CD pipelines. From 0.6.0 to 0.8.1, both SCA HTTP clients (src/ciguard/analyzer/sca/osv.py and src/ciguard/analyzer/sca/endoflife.py) call payload = json.loads(resp.read().decode('utf-8')) without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory. This vulnerability is fixed in 0.8.2.","status":"published","published":"2026-05-12T19:40:28.848Z","modified":"2026-10-28T02:31:04.604725977Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:45:04.820169Z"},{"id":"GHSA-xw8c-rrvx-f7xq","title":"ciguard: SCA HTTP client reads response body without size cap","description":"## Summary\n\nBoth SCA HTTP clients (`src/ciguard/analyzer/sca/osv.py` and `src/ciguard/analyzer/sca/endoflife.py`) call `payload = json.loads(resp.read().decode('utf-8'))` without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory.\n\n## Threat scenario\n\nciguard process memory exhaustion → OOM kill or system swap thrash. Realistic when ciguard runs in CI with a limited memory budget (typical: 4-8 GB). No data integrity or confidentiality impact.\n\n**Realism caveat:** both URLs are hardcoded HTTPS, so this is a low-realism threat (HTTPS prevents MITM unless the attacker controls a trusted CA or hijacks DNS in a way that doesn't trigger cert validation). The unbounded read is structural defence-in-depth, not a directly exploitable bug today.\n\n## Patch\n\n- New `MAX_RESPONSE_BYTES = 5 * 1024 * 1024` (5 MB) constant in both modules.\n- `body = resp.read(MAX_RESPONSE_BYTES + 1)` with overflow check returns `None` (caller falls back to stale cache).\n- 3 regression tests in `tests/test_sca_rules.py::TestSCAResponseSizeCap`.\n\n## Discovery\n\nFound during ciguard's first self-conducted pentest cycle, 2026-04-26.\n\n## CVSS Scoring\n\n- CVSS v3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L` — 3.7 (Low)\n- CVSS v4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N` — first.org calc 3.1 (Low); GitHub's calc 6.3 (Medium). Vector is correct — choosing v3.1 as the structured score keeps the consistent Low rating across consumers.\n\n## Reproduction\n\nMonkey-patch `urllib.request.urlopen` to return a fake 50 MB response; observe memory growth before/after the call. Pre-fix: process memory grows by ~50 MB. Post-fix: `_fetch` returns `None`, memory growth bounded to MAX_RESPONSE_BYTES.\n\n## References\n\n- Fix released in [v0.8.2](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2)\n- CI regression gate added in [v0.8.3](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3)\n- https://www.cve.org/CVERecord?id=CVE-2026-44219","status":"published","published":"2026-05-05T22:17:43Z","modified":"2026-07-13T16:42:46.790105846Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:47:00.604718Z"},{"id":"PYSEC-2026-2410","title":"ciguard: SCA HTTP client reads response body without size cap","description":"## Summary\n\nBoth SCA HTTP clients (`src/ciguard/analyzer/sca/osv.py` and `src/ciguard/analyzer/sca/endoflife.py`) call `payload = json.loads(resp.read().decode('utf-8'))` without a maximum-bytes cap. A hostile or compromised endoflife.date / OSV.dev (or a successful TLS MITM) could return a multi-GB response, exhausting the ciguard process's memory.\n\n## Threat scenario\n\nciguard process memory exhaustion → OOM kill or system swap thrash. Realistic when ciguard runs in CI with a limited memory budget (typical: 4-8 GB). No data integrity or confidentiality impact.\n\n**Realism caveat:** both URLs are hardcoded HTTPS, so this is a low-realism threat (HTTPS prevents MITM unless the attacker controls a trusted CA or hijacks DNS in a way that doesn't trigger cert validation). The unbounded read is structural defence-in-depth, not a directly exploitable bug today.\n\n## Patch\n\n- New `MAX_RESPONSE_BYTES = 5 * 1024 * 1024` (5 MB) constant in both modules.\n- `body = resp.read(MAX_RESPONSE_BYTES + 1)` with overflow check returns `None` (caller falls back to stale cache).\n- 3 regression tests in `tests/test_sca_rules.py::TestSCAResponseSizeCap`.\n\n## Discovery\n\nFound during ciguard's first self-conducted pentest cycle, 2026-04-26.\n\n## CVSS Scoring\n\n- CVSS v3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L` — 3.7 (Low)\n- CVSS v4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N` — first.org calc 3.1 (Low); GitHub's calc 6.3 (Medium). Vector is correct — choosing v3.1 as the structured score keeps the consistent Low rating across consumers.\n\n## Reproduction\n\nMonkey-patch `urllib.request.urlopen` to return a fake 50 MB response; observe memory growth before/after the call. Pre-fix: process memory grows by ~50 MB. Post-fix: `_fetch` returns `None`, memory growth bounded to MAX_RESPONSE_BYTES.\n\n## References\n\n- Fix released in [v0.8.2](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2)\n- CI regression gate added in [v0.8.3](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3)\n- https://www.cve.org/CVERecord?id=CVE-2026-44219","status":"published","published":"2026-07-13T15:15:38.425148Z","modified":"2026-07-13T16:32:11.256649647Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"},{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T15:52:55.961245Z"}]}}