Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when…
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex patterns in non-UTF-8 mode, which allows context-dependent attackers to obtain sensitive information or cause a denial of service (crash), as demonstrated by the "\X?\d" and "\P{L}?\d" patterns.
Why it matters now
EPSS 0.02492 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pcre:perl-compatible_regular_expression_library:*:*:*:*:*:*:*:* | up to 7.2 | Vulnerable | PCRE |
| cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | PCRE |
| cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.1:*:*:*:*:*:*:* | 7.1 | Vulnerable | PCRE |
| cpe:2.3:o:apple:mac_os_x:10.4.11:*:*:*:*:*:*:* | 10.4.11 | Vulnerable | Apple |
| cpe:2.3:o:apple:mac_os_x_server:10.4.11:*:*:*:*:*:*:* | 10.4.11 | Vulnerable | Apple |
- cpe:2.3:a:pcre:perl-compatible_regular_expression_library:*:*:*:*:*:*:*:* Versions up to 7.2 Vulnerable ·PCRE
- cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·PCRE
- cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.1:*:*:*:*:*:*:* Versions 7.1 Vulnerable ·PCRE
- cpe:2.3:o:apple:mac_os_x:10.4.11:*:*:*:*:*:*:* Versions 10.4.11 Vulnerable ·Apple
- cpe:2.3:o:apple:mac_os_x_server:10.4.11:*:*:*:*:*:*:* Versions 10.4.11 Vulnerable ·Apple
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2007-1661
- 2026-10-03 Alias added: GHSA-759q-4q8w-5gfh
References
Patch 1
Advisory 13
Other 10
- ADV-2007-4238
- https://issues.rpath.com/browse/RPL-1738
- ADV-2008-0924
- [gtk-devel-list] 20071107 GLib 2.14.3
- http://docs.info.apple.com/article.html?artnum=307179
- ADV-2007-3790
- ADV-2007-3725
- http://www.pcre.org/changelog.txt
- http://docs.info.apple.com/article.html?artnum=307562
- http://bugs.gentoo.org/show_bug.cgi?id=198976
Sources
- CVE-2007-1661 · CVE Program
- CVE-2007-1661 · NVD
- FIRST EPSS
- GHSA-759q-4q8w-5gfh · GitHub Advisory Database · CC BY 4.0
- CVE-2007-1661 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences