CVE-2022-24713
Regular expression denial of service in Rust's regex crate
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
regex is an implementation of regular expressions for the Rust language. The regex crate features built-in mitigations to prevent denial of service attacks caused by untrusted regexes, or untrusted input matched by trusted regexes. Those (tunable) mitigations already provide sane defaults to prevent attacks. This guarantee is documented and it's considered part of the crate's API. Unfortunately a bug was discovered in the mitigations designed to prevent untrusted regexes to take an arbitrary amount of time during parsing, and it's possible to craft regexes that bypass such mitigations. This makes it possible to perform denial of service attacks by sending specially crafted regexes to services accepting user-controlled, untrusted regexes. All versions of the regex crate before or equal to 1.5.4 are affected by this issue. The fix is include starting from regex 1.5.5. All users accepting user-controlled regexes are recommended to upgrade immediately to the latest version of the regex crate. Unfortunately there is no fixed set of problematic regexes, as there are practically infinite regexes that could be crafted to exploit this vulnerability. Because of this, it us not recommend to deny known problematic regexes.
Timeline
ID reserved
By GitHub_M
- 26 days later
· 26 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 14.5% · top 3.4% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- crates.ioregexGHSA-m5pq-gvj9-9vr8 (opens in a new tab)
References (12)
- https://github.com/rust-lang/regex/security/advisories/GHSA-m5pq-gvj9-9vr8 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/rust-lang/regex/commit/ae70b41d4f46641dbc45c7a4f87954aea356283e (opens in a new tab)x_refsource_MISCx_transferred
- https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2022-ceb3e03c5e (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2022-8436ac4c39 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2022-d20d44ba98 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- [debian-lts-announce] 20220407 [SECURITY] [DLA 2971-1] firefox-esr security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-5113 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20220411 [SECURITY] [DLA 2978-1] thunderbird security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-5118 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- GLSA-202208-08 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- GLSA-202208-14 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-m5pq-gvj9-9vr8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-24713)Record last updated .