{"items":[{"id":"NVI-00009146","kind":"vulnerability","title":"GitPython parse_actor_and_date() is vulnerable to quadratic backtracking on malformed identity lines","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-m64x-33q8-m5h7"],"plain_summary":"GitHub lists this reviewed advisory for GitPython. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-cdcbde01528a2bfd24e05b7feb8108c5"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-cdcbde01528a2bfd24e05b7feb8108c5","url":"https://github.com/advisories/GHSA-m64x-33q8-m5h7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-m64x-33q8-m5h7","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-cdcbde01528a2bfd24e05b7feb8108c5"],"technology":"GitPython","known_exclusions":[],"conditions_summary":"### Summary\n\nThis is a residual of GHSA-g5vv-9gxw-82hx / CVE-2026-87819. The 3.1.60 fix made `Actor._from_string` regex-free, but `parse_actor_and_date` still runs `_re_actor_epoch` on the same author/committer/tagger line one step earlier. That pattern backtracks quadratically when the trailing epoch or timezone is missing or malformed, so the same class of slow parse is still reachable in 3.1.62.\n\n### Details\n\n`git/objects/util.py:322`:\n\n```python\n_re_actor_epoch = re.compile(r\"^.+? (.*) (\\d+) ([+-]\\d+).*$\")\n```\n\n`.+?` and `(.*)` can both absorb the same run of spaces, and the required ` (\\d+) ([+-]\\d+)` tail is only checked after them. On a long line with no valid tail, the search retries every split point.\n\nIt is called from `parse_actor_and_date` (`git/objects/util.py:335`), which runs on the author and committer lines in `Commit._deserialize` (`git/objects/commit.py:917`, `:931`) and on the tagger line in `git/objects/tag.py:129`.\n\nThe published payload (letters plus an unterminated `<`) is fast on 3.1.62. Replacing the letters with spaces is not:\n\n| author line (after `author `) | 2 KB | 8 KB | 32 KB |\n|---|---|---|---|\n| `'a'*n + ' <'` (advisory payload) | 0.0 ms | 0.1 ms |","public_affected_ranges":["<= 3.1.62"]}],"null_published_at":"2026-10-31T22:13:31.286Z","source_updated_at":"2026-10-27T15:26:25.000Z","source_disclosed_at":"2026-10-27T15:26:24.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:56:51.534Z"}],"next_cursor":null,"snapshot_revision":"42594"}