CVE-2026-116135: vulnerability in HTTP-Body
HTTP::Body versions before 1.23_01 for Perl drop mixed-case percent escapes from urlencoded form fields instead of decoding them
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.3%
HTTP::Body versions before 1.23_01 for Perl drop mixed-case percent escapes from urlencoded form fields instead of decoding them.
The decode table holds only the all-lowercase and all-uppercase spelling of each hex pair, while the escape pattern matches either case. An escape such as %aB finds no entry and is replaced with nothing, joining the bytes on either side. Hex digits in percent escapes are case-insensitive, and conforming decoders return the byte.
A remote attacker can send a field name or value that a conforming decoder in front of the application reads differently, so that pass%aBword reaches the application as password.
Affected products
HTTP-BodyRelated CVEs — HTTP-Body
In the same product, most dangerous first.
CVE-2026-116132—HTTP::Body versions before 1.23_01 for Perl leave the temporary file of an incomplete multipart upload on diskEPSS 0.3%CVE-2026-116134—HTTP::Body versions before 1.23_01 for Perl allow memory exhaustion via an unbounded multipart part header blockEPSS 0.3%CVE-2026-116133—HTTP::Body versions before 1.23_01 for Perl allow CPU exhaustion via quadratic rescanning of a multipart body with a missing or malformed boundaryEPSS 0.3%CVE-2026-116131—HTTP::Body versions before 1.23_01 for Perl allow memory and temporary file exhaustion via an unlimited number of form fields and multipart partsEPSS 0.3%CVE-2026-116531—HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunkEPSS 0.3%CVE-2026-116285—HTTP::Body versions before 1.23_01 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodiesEPSS 0.3%