| Name | CVE-2026-33176 |
| Description | Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Support number helpers accept strings containing scientific notation (e.g. `1e10000`), which `BigDecimal` expands into extremely large decimal representations. This can cause excessive memory allocation and CPU consumption when the expanded number is formatted, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4829-1, DSA-6546-1 |
| Debian Bugs | 1132035 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| rails (PTS) | bookworm | 2:6.1.7.10+dfsg-1~deb12u2 | vulnerable |
| bookworm (security) | 2:6.1.7.10+dfsg-1~deb12u3 | fixed | |
| trixie | 2:7.2.2.2+dfsg-2~deb13u1 | vulnerable | |
| trixie (security) | 2:7.2.2.2+dfsg-2~deb13u2 | fixed | |
| forky | 2:7.2.4+dfsg-1 | fixed | |
| sid | 2:7.2.4+dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| rails | source | bookworm | 2:6.1.7.10+dfsg-1~deb12u3 | DLA-4829-1 | ||
| rails | source | trixie | 2:7.2.2.2+dfsg-2~deb13u2 | DSA-6546-1 | ||
| rails | source | (unstable) | 2:7.2.3.1+dfsg-1 | 1132035 |
[bullseye] - rails <postponed> (Minor issue, DoS)
https://github.com/rails/rails/security/advisories/GHSA-2j26-frm8-cmj9
Fixed by: https://github.com/rails/rails/commit/19dbab51ca086a657bb86458042bc44314916bcb (v8.1.2.1)
Fixed by: https://github.com/rails/rails/commit/ee2c59e730e5b8faed502cd2c573109df093f856 (v8.0.4.1)
Fixed by: https://github.com/rails/rails/commit/ebd6be18120d1136511eb516338e27af25ac0a1a (v7.2.3.1)