python-cryptography: Duplicate self-signed intermediates can cause exponential path-building

SummaryWhen resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents...

PYSEC-2026-3553 python-cryptography: Duplicate self-signed intermediates can cause exponential path-building

Summary When resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents...

cryptography: PKCS#7 EnvelopedData decryption exposes a Bleichenbacher oracle through distinguishable errors and timing

Summarypkcs7decryptder, pkcs7decryptpem, and pkcs7decryptsmime reported theoutcome of decrypting a RecipientInfo's encryptedKey in severaldistinguishable ways, one of which disclosed the exact length recovered from theRSA operation. The same distinction was also observable by timing. Anapplicatio...

PYSEC-2026-3552 cryptography: PKCS#7 EnvelopedData decryption exposes a Bleichenbacher oracle through distinguishable errors and timing

Summary pkcs7decryptder, pkcs7decryptpem, and pkcs7decryptsmime reported the outcome of decrypting a RecipientInfo's encryptedKey in several distinguishable ways, one of which disclosed the exact length recovered from the RSA operation. The same distinction was also observable by timing. An...

PYSEC-2026-3617 Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot

Summary The ALLOWEDSOURCES configuration is meant to restrict which hosts Thumbor's HTTP loader may fetch images from. Plain-string entries in that list the overwhelming majority of real-world and documented configurations are passed directly to re.match without escaping. Because . is a regex...

Natural Language Toolkit (NLTK): ReDoS in NLTK ReviewsCorpusReader FEATURES regex

SummaryReviewsCorpusReader extracts feature annotations of the form label followed by a bracketed signed digit e.g. a label then +2 from each review line, using the module-level FEATURES regex. The feature-label sub-pattern is unbounded — an optional greedy run of word-plus-whitespace groups...

PYSEC-2026-3582 Natural Language Toolkit (NLTK): ReDoS in NLTK ReviewsCorpusReader FEATURES regex

Summary ReviewsCorpusReader extracts feature annotations of the form label followed by a bracketed signed digit e.g. a label then +2 from each review line, using the module-level FEATURES regex. The feature-label sub-pattern is unbounded — an optional greedy run of word-plus-whitespace groups...

Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot

SummaryThe ALLOWEDSOURCES configuration is meant to restrict which hosts Thumbor's HTTP loader may fetch images from. Plain-string entries in that list the overwhelming majority of real-world and documented configurations are passed directly to re.match without escaping. Because . is a regex...

Flyto2 Core: Guarded HTTP modules follow redirects into internal space without per-hop SSRF revalidation

SummaryThe HTTP modules that DO call the SSRF guard http.get, http.request, http.batch validate only the initial URL, then issue the request with aiohttp's default allowredirects=True and perform no per-hop revalidation. An attacker hosts a public URL that 302-redirects to an internal address; th...

PYSEC-2026-3586 OnionShare Receive mode writes uploaded files even when file uploads are disabled

Summary OnionShare CLI/Desktop 2.6.3 does not enforce the Receive mode disablefiles setting at the file upload sink. When a Receive service is configured as a text-message-only endpoint --disable-files / "Disable uploading files", a remote sender who can reach the OnionShare service can still sen...

Flyto2 Core: ${env.VAR} interpolation reads any env secret despite env.get being denylisted

SummaryThe capability policy denies the env.get and env.loaddotenv modules by default, with the stated reason that they read arbitrary host environment variables API keys, DSNs and are a secret-exfil risk. But the workflow engine's variable resolver expands $env.VAR for any environment variable...

PYSEC-2026-3607 proot-distro has a Container Isolation Bypass via Crafted Restore Archive

Affected Component - Package: proot-distro - Affected command: restore - Attack surface: Host-side Termux CLI processing a user-supplied backup archive - Vulnerability type: Container Isolation Bypass / Cross-Container Read and Write --- Affected Versions | Component | Version | |---|---| |...

PYSEC-2026-3569 Flyto2 Core: Guarded HTTP modules follow redirects into internal space without per-hop SSRF revalidation

Summary The HTTP modules that DO call the SSRF guard http.get, http.request, http.batch validate only the initial URL, then issue the request with aiohttp's default allowredirects=True and perform no per-hop revalidation. An attacker hosts a public URL that 302-redirects to an internal address; t...

proot-distro has a Container Isolation Bypass via Crafted Restore Archive

Affected Component- Package: proot-distro- Affected command: restore- Attack surface: Host-side Termux CLI processing a user-supplied backup archive- Vulnerability type: Container Isolation Bypass / Cross-Container Read and Write--- Affected Versions| Component | Version ||---|---|| proot-distro ...

PYSEC-2026-3570 Flyto2 Core: ${env.VAR} interpolation reads any env secret despite env.get being denylisted

Summary The capability policy denies the env.get and env.loaddotenv modules by default, with the stated reason that they read arbitrary host environment variables API keys, DSNs and are a secret-exfil risk. But the workflow engine's variable resolver expands $env.VAR for any environment variable...

`datamodel-code-generator` vulnerable to code injection via unescaped carriage return in `--extra-template-data` `comment` field

Summarydatamodel-code-generator is vulnerable to code injection when a developer passes an --extra-template-data file whose comment value contains a literal \r carriage return. The comment variable is rendered into a Python comment in six built-in templates with no line-terminator escaping...

datamodel-code-generator vulnerable to SSRF via --url: no host/IP validation, follows redirects

Summarydatamodel-code-generator's built-in HTTP fetcher http.getbody issues an httpx.GET against any URL passed to --url or reached via a redirect chain with no allow-list, no deny-list, no IP/host validation, and followredirects=True. Loopback addresses, RFC1918 ranges, link-local 169.254.169.25...

`datamodel-code-generator` vulnerable to code execution on import via `x-python-type` JSON-Schema extension in datamodel-code-generator

Summarydatamodel-code-generator honours a custom x-python-type JSON-Schema extension that lets a schema author override the generated Python type for a field. The value is forwarded verbatim into the generated Python source as the field annotation, with a single sanitisation pass that is trivial ...

`datamodel-code-generator` vulnerable to code execution on import via unescaped `validators` entries in --extra-template-data

SummaryWhen the Pydantic v2 output mode is in use, datamodel-code-generator reads a validators array from each model entry in the --extra-template-data file and synthesises a Pydantic @fieldvalidator... decorator from each entry. The field names and the validator mode are interpolated into the...

datamodel-code-generator vulnerable to SSRF via JSON-Schema `$ref` to HTTP URL (silent by default)

SummaryJSON-Schema $ref values pointing at HTTP or HTTPS URLs are silently dereferenced by datamodel-code-generator with no IP/host validation, no scheme allow-list, and redirects followed unconditionally. The --allow-remote-refs gate added in 0.56.0 defaults to None, which only emits a deprecati...